The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2023:4383 advisory.

    OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating     systems. It includes the core files necessary for both the OpenSSH client and server.

    Security Fix(es):

    * openssh: Remote code execution in ssh-agent PKCS#11 support (CVE-2023-38408)

    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 this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2023-273 advisory.

    The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path,     leading to remote code execution if the target user's ssh-agent is forwarded to an attacker-controlled     system (the code in /usr/lib is not necessarily safe for loading into ssh-agent). Exploitation can also be     prevented by starting ssh-agent with an empty PKCS#11/FIDO allowlist (ssh-agent -P '') or by configuring     an allowlist that contains only specific provider libraries. NOTE: this issue exists because of an     incomplete fix for CVE-2016-10009. (CVE-2023-38408)

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

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

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 291d0953-47c1-11ee-8e38-002590c1f29c advisory.

  - The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path,     leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in     /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an     incomplete fix for CVE-2016-10009. (CVE-2023-38408)

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

The version of AHV installed on the remote host is prior to 20230302.102005. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AHV-20230302.216 advisory.

  - The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path,     leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in     /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an     incomplete fix for CVE-2016-10009. (CVE-2023-38408)

  - A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may     allow an authenticated client to cause a denial of service. (CVE-2023-1667)

  - A vulnerability was found in libssh, where the authentication check of the connecting client can be     bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen     if there is insufficient memory or the memory usage is limited. The problem is caused by the return value     `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call     `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the     cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.
    (CVE-2023-2283)

  - Every `named` instance configured to run as a recursive resolver maintains a cache database holding the     responses to the queries it has recently sent to authoritative servers. The size limit for that cache     database can be configured using the `max-cache-size` statement in the configuration file; it defaults to     90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the     configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets     from the cache, to keep memory use below the configured limit. It has been discovered that the     effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the     resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size`     limit to be significantly exceeded. This issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0     through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.
    (CVE-2023-2828)

  - Buffer Overflow vulnerability found in SQLite3 v.3.27.1 and before allows a local attacker to cause a     denial of service via a crafted script. (CVE-2020-24736)

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

According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path,     leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in     /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an     incomplete fix for CVE-2016-10009. (CVE-2023-38408)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2023:4419 advisory.

  - The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path,     leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in     /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an     incomplete fix for CVE-2016-10009. (CVE-2023-38408)

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

The remote MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2023-6281:08 advisory.

    * openssh: Remote code execution in ssh-agent PKCS#11 support (CVE-2023-38408)

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

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

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2023-6280:07 advisory.

    openssh: Remote code execution in ssh-agent PKCS#11 support (CVE-2023-38408)

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

Note that Nessus has not tested for this issue 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
179150	RHEL 8 : openssh (RHSA-2023:4383)	Nessus	Red Hat Local Security Checks	2023/8/1	2024/11/7	critical
179760	Amazon Linux 2023 : openssh, openssh-clients, openssh-keycat (ALAS2023-2023-273)	Nessus	Amazon Linux Local Security Checks	2023/8/14	2024/12/11	critical
180341	FreeBSD : FreeBSD -- Potential remote code execution via ssh-agent forwarding (291d0953-47c1-11ee-8e38-002590c1f29c)	Nessus	FreeBSD Local Security Checks	2023/8/31	2023/8/31	critical
181785	Nutanix AHV : Multiple Vulnerabilities (NXSA-AHV-20230302.216)	Nessus	Misc.	2023/9/22	2025/2/19	critical
188177	EulerOS 2.0 SP11 : openssh (EulerOS-SA-2023-2846)	Nessus	Huawei Local Security Checks	2024/1/16	2024/1/16	critical
190135	CentOS 8 : openssh (CESA-2023:4419)	Nessus	CentOS Local Security Checks	2024/2/8	2024/2/8	critical
291874	MiracleLinux 9 : openssh-8.7p1-30.el9 (AXSA:2023-6281:08)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	critical
292374	MiracleLinux 7 : openssh-7.4p1-23.el7 (AXSA:2023-6280:07)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	critical

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