The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5586 advisory.

    Several vulnerabilities have been discovered in OpenSSH, an implementation of the SSH protocol suite.
    CVE-2021-41617 It was discovered that sshd failed to correctly initialise supplemental groups when     executing an AuthorizedKeysCommand or AuthorizedPrincipalsCommand, where a AuthorizedKeysCommandUser or     AuthorizedPrincipalsCommandUser directive has been set to run the command as a different user. Instead     these commands would inherit the groups that sshd was started with. CVE-2023-28531 Luci Stanescu reported     that a error prevented constraints being communicated to the ssh-agent when adding smartcard keys to the     agent with per-hop destination constraints, resulting in keys being added without constraints.
    CVE-2023-48795 Fabian Baeumer, Marcus Brinkmann and Joerg Schwenk discovered that the SSH protocol is     prone to a prefix truncation attack, known as the Terrapin attack. This attack allows a MITM attacker to     effect a limited break of the integrity of the early encrypted SSH transport protocol by sending extra     messages prior to the commencement of encryption, and deleting an equal number of consecutive messages     immediately after encryption starts. Details can be found at https://terrapin-attack.com/ CVE-2023-51384     It was discovered that when PKCS#11-hosted private keys were added while specifying destination     constraints, if the PKCS#11 token returned multiple keys then only the first key had the constraints     applied. CVE-2023-51385 It was discovered that if an invalid user or hostname that contained shell     metacharacters was passed to ssh, and a ProxyCommand, LocalCommand directive or match exec predicate     referenced the user or hostname via expansion tokens, then an attacker who could supply arbitrary     user/hostnames to ssh could potentially perform command injection. The situation could arise in case of     git repositories with submodules, where the repository could contain a submodule with shell characters in     its user or hostname. For the oldstable distribution (bullseye), these problems have been fixed in version     1:8.4p1-5+deb11u3. For the stable distribution (bookworm), these problems have been fixed in version     1:9.2p1-2+deb12u2. We recommend that you upgrade your openssh packages. For the detailed security status     of openssh please refer to its security tracker page at: https://security-     tracker.debian.org/tracker/openssh

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

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

Detections

Analytics

Debian DSA-5586-1 : openssh - security update

critical Nessus Plugin ID 187213

Version 1.7

Version 1.6

Version 1.5

Version 1.4

Version 1.4

Version 1.3

Version 1.3

Version 1.2

Version 1.1

Version 1.0

Version 1.7 Jan 24, 2025, 9:25 PM CVSS metrics ("Cvssv4 score" set to 9.3) CVSS metrics ("Cvssv4 threat vector" set to "CVSS:4.0/E:P") CVSS metrics ("Cvssv4 vector" set to "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N") Plugin metadata Plugin Feed: 202501242125
Version 1.6 Jul 5, 2024, 4:58 PM IAVM reference Plugin Feed: 202407051658
Version 1.5 Jan 4, 2024, 3:23 PM CVSSv3 score source (changed from "CVE-2023-51385" to "CVE-2023-28531") Plugin Feed: 202401041523
Version 1.4 Dec 25, 2023, 6:31 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202312250631
Version 1.4 Jan 4, 2024, 1:31 PM CVSSv3 score source (changed from "CVE-2023-51385" to "CVE-2023-28531") Plugin Feed: 202401041331
Version 1.3 Dec 24, 2023, 10:38 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202312242238
Version 1.3 Dec 25, 2023, 4:35 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202312250435
Version 1.2 Dec 24, 2023, 4:31 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202312241631
Version 1.1 Dec 24, 2023, 12:19 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202312241219
Version 1.0 Dec 22, 2023, 5:21 PM New Plugin Feed: 202312221721