The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0046 advisory.

    Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data     objects.

    Security Fix(es):

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-0046 advisory.

    - Fix squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)
    - Fix squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)
    - Fix squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)
    - Fix squid: Incorrect Check of Function Return Value In Helper Process management(CVE-2023-49286)
    - Fix squid: DoS against HTTP and HTTPS (CVE-2023-5824)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2024:0072 advisory.

    Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data     objects.

    Security Fix(es):

    * squid: DoS against HTTP and HTTPS (CVE-2023-5824)

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2024:0071 advisory.

  - Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions     3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of     Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial     of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a     server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version     6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch     archives. Those who you use a prepackaged version of Squid should refer to the package vendor for     availability information on updated packages. (CVE-2023-46724)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer     dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The     gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this     bug are possible to be received from any gopher server, even those without malicious intent. Gopher     support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade     should reject all gopher URL requests. (CVE-2023-46728)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug     Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed     by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
    (CVE-2023-49285)

  - Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of     Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process     management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known     workarounds for this vulnerability. (CVE-2023-49286)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0397 advisory.

    Squid is a high-performance proxy caching server for web clients, supporting FTP, and HTTP data objects.

    Security Fix(es):

    * squid: DoS against HTTP and HTTPS (CVE-2023-5824)

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    * squid: denial of service in HTTP request parsing (CVE-2023-50269)

    Bug Fix(es):

    * squid crashes in assertion when a parent peer exists (JIRA:RHEL-18256)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2024:1153 advisory.

    Squid is a high-performance proxy caching server for web clients, supporting FTP, and HTTP data objects.

    Security Fix(es):

    * squid: DoS against HTTP and HTTPS (CVE-2023-5824)

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    * squid: denial of service in HTTP request parsing (CVE-2023-50269)

    Bug Fix(es):

    * squid crashes in assertion when a parent peer exists (RHEL-18248)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-1787 advisory.

    - Resolves: CVE-2021-28651 squid: Bug 5104: Memory leak in RFC 2169 response parsing (#778)
    - Resolves: CVE-2021-28652 squid: Bug 5106: Broken cache manager URL parsing (#788)
    - Resolves: CVE-2021-31806,31807,31808 squid: Handle more Range requests (#790)
    - Resolves: CVE-2021-33620 squid: Handle more partial responses (#791)
    - Resolves: RHEL-16779 - squid: NULL pointer dereference in the gopher protocol       code -- Remove support for Gopher protocol (CVE-2023-46728)
    - Resolves: RHEL-18176 - squid: Buffer over-read in the HTTP Message processing       feature (CVE-2023-49285)
    - Resolves: RHEL-18171 - squid: Incorrect Check of Function Return Value In       Helper Process management (CVE-2023-49286)
    - Resolves: RHEL-16758 - squid: Denial of Service in SSL Certificate validation       (CVE-2023-46724)
    - Resolves: RHEL-19557 - squid: denial of service in HTTP request parsing       (CVE-2023-50269)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the squid package has been released.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2024:0020 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2023-46724:
    Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions     3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of     Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial     of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a     server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version     6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch     archives. Those who you use a prepackaged version of Squid should refer to the package vendor for     availability information on updated packages.

    CVE-2023-46728:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer     dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The     gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this     bug are possible to be received from any gopher server, even those without malicious intent. Gopher     support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade     should reject all gopher URL requests.

    CVE-2023-49285:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug     Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed     by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

    CVE-2023-49286:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of     Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process     management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known     workarounds for this vulnerability.

    CVE-2023-5824:
    Squid is vulnerable to Denial of Service attack against HTTP and HTTPS clients due to an Improper Handling     of Structural Elements bug.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2024:0001 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2023-46724:
     Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid     versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using --with-openssl are vulnerable to a Denial     of Service attack against SSL Certificate validation. This problem allows a remote server to perform     Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL     Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed     in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in     Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package     vendor for availability information on updated packages.

    CVE-2023-46728:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer     dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The     gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this     bug are possible to be received from any gopher server, even those without malicious intent. Gopher     support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade     should reject all gopher URL requests.

    CVE-2023-49285:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug     Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed     by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

    CVE-2023-49286:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of     Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process     management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known     workarounds for this vulnerability.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-445 advisory.

    2024-02-29: CVE-2024-25617 was added to this advisory.

    2024-02-29: CVE-2023-49285 was removed from this advisory.

    2024-02-29: The severity of this advisory has been changed from important to medium.

    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of     Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process     management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known     workarounds for this vulnerability. (CVE-2023-49286)

    Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Collapse     of Data into Unsafe Value bug ,Squid may be vulnerable to a Denial of Service attack against HTTP header     parsing. This problem allows a remote client or a remote server to perform Denial of Service when sending     oversized headers in HTTP messages. In versions of Squid prior to 6.5 this can be achieved if the     request_header_max_size or reply_header_max_size settings are unchanged from the default. In Squid version     6.5 and later, the default setting of these parameters is safe. Squid will emit a critical warning in     cache.log if the administrator is setting these parameters to unsafe values. Squid will not at this time     prevent these settings from being changed to unsafe values. Users are advised to upgrade to version 6.5.
    There are no known workarounds for this vulnerability. This issue is also tracked as SQUID-2024:2     (CVE-2024-25617)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-6317eaa767 advisory.

    - New version 6.6
    - Important security fixes
    - Removed gopher support

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:1787 advisory.

    Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data     objects.

    Security Fix(es):

    * squid: denial of service in HTTP header parser (CVE-2024-25617)

    * squid: denial of service in HTTP request parsing (CVE-2023-50269)

    * squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

    * squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

    * squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

    * squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6857-1 advisory.

    Joshua Rogers discovered that Squid incorrectly handled requests with the urn: scheme. A remote attacker     could possibly use this issue to cause Squid to consume resources, leading to a denial of service. This     issue only affected Ubuntu 16.04 LTS. (CVE-2021-28651)

    It was discovered that Squid incorrectly handled SSPI and SMB authentication. A remote attacker could use     this issue to cause Squid to crash, resulting in a denial of service, or possibly obtain sensitive     information. This issue only affected Ubuntu 16.04 LTS. (CVE-2022-41318)

    Joshua Rogers discovered that Squid incorrectly handled HTTP message processing. A remote attacker could     possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2023-49285)

    Joshua Rogers discovered that Squid incorrectly handled Helper process management. A remote attacker could     possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2023-49286)

    Joshua Rogers discovered that Squid incorrectly handled HTTP request parsing. A remote attacker could     possibly use this issue to cause Squid to crash, resulting in a denial of service.

    (CVE-2023-50269, CVE-2024-25617)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2024:0116 advisory.

    Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:

    CVE-2023-46724:
    A flaw was found in Squid. Due to an improper validation of the specified index bug, Squid compiled using     `--with-openssl` is vulnerable to a denial of service attack against SSL Certificate validation. This flaw     allows a remote server to perform a denial of service against the Squid Proxy by initiating a TLS     Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited     to HTTPS and SSL-Bump.

    CVE-2023-46728:
    Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer     dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The     gopher protocol is always available and enabled in Squid. This issue may lead to a remote denial of     service via gopher URL requests.

    CVE-2023-49285:
    A buffer over-read flaw was found in Squid's HTTP Message processing feature. This issue may allow     attackers to perform remote denial of service.

    CVE-2023-49286:
    A flaw was found in Squid due to an incorrect check of the return value in the helper process management.
    This issue may allow attackers to perform remote denial of service.

    CVE-2023-50269:
    A flaw was found in Squid, which is susceptible to a Denial of Service (DoS) due to an Uncontrolled     Recursion bug, specifically targeting HTTP Request parsing. Exploiting this issue involves a remote client     initiating a DoS attack by sending an oversized X-Forwarded-For header when the follow_x_forwarded_for     feature is configured. This issue poses a threat to the stability and availability of the Squid service.

    CVE-2024-25617:
    A flaw was found in Squid. This issue may allow a remote client or remote server to trigger a denial of     service when sending oversized headers in HTTP messages.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
187632	RHEL 8 : squid:4 (RHSA-2024:0046)	Nessus	Red Hat Local Security Checks	2024/1/3	2025/4/29	high
187640	Oracle Linux 8 : squid:4 (ELSA-2024-0046)	Nessus	Oracle Linux Local Security Checks	2024/1/4	2025/9/9	high
187675	RHEL 9 : squid (RHSA-2024:0072)	Nessus	Red Hat Local Security Checks	2024/1/8	2025/8/27	critical
187681	AlmaLinux 9 : squid (ALSA-2024:0071)	Nessus	Alma Linux Local Security Checks	2024/1/8	2024/1/8	high
189652	RHEL 8 : squid:4 (RHSA-2024:0397)	Nessus	Red Hat Local Security Checks	2024/1/26	2025/8/27	critical
191572	RHEL 9 : squid (RHSA-2024:1153)	Nessus	Red Hat Local Security Checks	2024/3/5	2025/8/27	critical
193259	Oracle Linux 7 : squid (ELSA-2024-1787)	Nessus	Oracle Linux Local Security Checks	2024/4/12	2025/9/9	high
204099	Photon OS 3.0: Squid PHSA-2023-3.0-0701	Nessus	PhotonOS Local Security Checks	2024/7/24	2024/7/24	high
236724	Alibaba Cloud Linux 3 : 0020: squid:4 (ALINUX3-SA-2024:0020)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	high
238995	TencentOS Server 3: squid:4 (TSSA-2024:0001)	Nessus	Tencent Local Security Checks	2025/6/16	2025/12/5	high
186968	Amazon Linux 2023 : squid (ALAS2023-2023-445)	Nessus	Amazon Linux Local Security Checks	2023/12/15	2025/1/10	high
187386	Fedora 38 : squid (2023-6317eaa767)	Nessus	Fedora Local Security Checks	2023/12/28	2024/11/14	high
193230	RHEL 7 : squid (RHSA-2024:1787)	Nessus	Red Hat Local Security Checks	2024/4/11	2025/1/10	high
201112	Ubuntu 16.04 LTS / 18.04 LTS : Squid vulnerabilities (USN-6857-1)	Nessus	Ubuntu Local Security Checks	2024/6/27	2025/9/3	high
239411	TencentOS Server 2: squid (TSSA-2024:0116)	Nessus	Tencent Local Security Checks	2025/6/16	2025/11/20	high

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