リモートホストにインストールされている squid のバージョンは 4.15-1 以前です。 したがって、ALAS2SQUID4-2023-004 のアドバイザリに記載されている複数の脆弱性の影響を受けます。

  - 4.14までのSquidおよび5.0.5までの5.xでは、一部の構成で、WCCPプロトコルデータの領域外読み取りのために情報漏洩が可能になります。これは、nobodyのようなリモートコード実行のチェーンの一部として利用される可能性があります。(CVE-2021-28116)

  - 4.15 の前の Squid と 5.0.6 の前の 5.x で問題が発見されました。バッファ管理のバグにより、サービス拒否が発生する可能性があります。urn:スキームを使ってリクエストを解決すると、パーサーが少量のメモリを漏洩します。ただし、大量のメモリ消費を容易に発生させられる詳細不明な攻撃方法が存在します。(CVE-2021-28651)

  - 4.15 の前の Squid と 5.0.6 の前の 5.x で問題が発見されました。パーサーの検証が不適切なため、Cache Manager APIに対してDoS攻撃(サービス拒否攻撃) を引き起こすことが可能です。このため、信頼できるクライアントによるメモリリークが発生する可能性があります。時間の経過とともに、詳細不明な短いクエリ文字列を介したサービス拒否が引き起こされる可能性があります。この攻撃は、キャッシュマネージャーAPIアクセス権限を持つクライアントに限定されています。(CVE-2021-28652)

  -4.15の前のSquid 4.xと5.0.6の前の5.xで問題が見つかりました。リモートサーバーがHTTPまたはHTTPSで特定の応答ヘッダーを送信する場合、サービス拒否が発生する可能性があります。このヘッダーは、良性のネットワークトラフィックで発生する可能性があります。(CVE-2021-28662)

  - 4.15の前のSquidと5.0.6の前の5.xで問題が発見されました。メモリ管理のバグのため、HTTP範囲リクエスト処理を介した (プロキシを使用するすべてのクライアントに対する) サービス拒否攻撃に脆弱です。 (CVE-2021-31806)

  - 4.15 の前の Squid と 5.0.6 の前の 5.x で問題が発見されました。整数オーバーフローの問題のため、応答をHTTP範囲リクエストに配信するときに、リモートサーバーがサービス拒否を引き起こす可能性があります。この問題を発生させるのは、悪意のない HTTP トラフィックに存在すると思われるヘッダーです。
    (CVE-2021-31807)

  - 4.15 の前の Squid と 5.0.6 の前の 5.x で問題が発見されました。入力検証のバグのため、 (プロキシを使用するすべてのクライアントに対する) サービス拒否攻撃に脆弱です。この攻撃はクライアントがHTTP範囲リクエストを送信して発生させます。 (CVE-2021-31808)

  -4.15以前のSquidおよび5.0.6以前の5.xでは、リモートサーバーが、HTTP応答を介して (すべてのクライアントの可用性に影響を与える) サービス拒否を引き起こす可能性があります。この問題を発生させるのは、サーバーによる悪意のないHTTPトラフィックに存在すると思われるヘッダーです。(CVE-2021-33620)

Nessus はこれらの問題をテストしておらず、代わりにアプリケーションが自己報告するバージョン番号にのみ依存していることに注意してください。

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2553-1 advisory.

  - Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting     availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to     exist in HTTP traffic without any malicious intent by the server. (CVE-2021-33620)

  - In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses. (CVE-2021-46784)

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0132 advisory.

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

    CVE-2021-28116:
    Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of     an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code     execution as nobody.

    CVE-2021-28651:
    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it     allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount     of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of     memory consumption.

    CVE-2021-28652:
    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to incorrect parser validation, it     allows a Denial of Service attack against the Cache Manager API. This allows a trusted client to trigger     memory leaks that. over time, lead to a Denial of Service via an unspecified short query string. This     attack is limited to clients with Cache Manager API access privilege.

    CVE-2021-28662:
    An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain     response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in     benign network traffic.

    CVE-2021-31806:
    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is     vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request     processing.

    CVE-2021-31807:
    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a     remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue     trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.

    CVE-2021-31808:
    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is     vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP     Range request to trigger this.

    CVE-2021-33620:
    Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting     availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to     exist in HTTP traffic without any malicious intent by the server.

    CVE-2021-46784:
    In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a     Denial of Service can occur when processing long Gopher server responses.

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 remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-4292 advisory.

    libecap     squid     [7:4.15-1]
    - new version 4.15
    - Resolves: #1964384 - squid:4 rebase to 4.15

    [7:4.11-5]
    - Resolves: #1944261 - CVE-2020-25097 squid:4/squid: improper input validation       may allow a trusted client to perform HTTP Request Smuggling

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 version of squid installed on the remote host is prior to 3.5.20-17. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-1950 advisory.

    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it     allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount     of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of     memory consumption. (CVE-2021-28651)

    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to incorrect parser validation, it     allows a Denial of Service attack against the Cache Manager API. This allows a trusted client to trigger     memory leaks that. over time, lead to a Denial of Service via an unspecified short query string. This     attack is limited to clients with Cache Manager API access privilege. (CVE-2021-28652)

    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a memory-management bug, it is     vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request     processing. (CVE-2021-31806)

    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a     remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue     trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.
    (CVE-2021-31807)

    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is     vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP     Range request to trigger this. (CVE-2021-31808)

    Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting     availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to     exist in HTTP traffic without any malicious intent by the server. (CVE-2021-33620)

    A flaw was found in squid. A trusted client can directly access the cache manager information, bypassing     the manager ACL protection and resulting in information disclosure. (CVE-2022-41317)

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
181987	Amazon Linux 2: squid (ALASSQUID4-2023-004)	Nessus	Amazon Linux Local Security Checks	2023/9/27	2024/12/11	medium
163487	SUSE SLES15 Security Update : squid (SUSE-SU-2022:2553-1)	Nessus	SuSE Local Security Checks	2022/7/27	2023/7/13	medium
236478	Alibaba Cloud Linux 3 : 0132: squid:4 (ALINUX3-SA-2022:0132)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	medium
155429	Oracle Linux 8 : squid:4 (ELSA-2021-4292)	Nessus	Oracle Linux Local Security Checks	2021/11/17	2024/10/22	high
171805	Amazon Linux 2 : squid (ALAS-2023-1950)	Nessus	Amazon Linux Local Security Checks	2023/2/22	2024/12/11	medium

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