CVE-2021-28041

Published: 05 March 2021

ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.

Priority

Medium

CVSS 3 base score: 7.1

Status

Package Release Status
openssh
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo)
Released (1:8.4p1-4ubuntu2)
Ubuntu 20.10 (Groovy Gorilla)
Released (1:8.3p1-1ubuntu0.1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1:8.2p1-4ubuntu0.2)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(code not present)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(code not present)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(code not present)
Patches:
Upstream: https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db
openssh-ssh1
Launchpad, Ubuntu, Debian
Upstream Ignored
(frozen on openssh 7.5p)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(code not present)
Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(code not present)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(code not present)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(code not present)
Ubuntu 16.04 LTS (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Notes

AuthorNote
seth-arnold
openssh-ssh1 is provided for compatibility with old devices that
cannot be upgraded to modern protocols. Thus we may not provide security
support for this package if doing so would prevent access to equipment.

References