Bug#1042460: openssh-client: ssh-agent CVE-2023-38408
Package: openssh-client
Version: 1:8.4p1-5+deb11u1
Severity: grave
Tags: security upstream
Justification: user security hole
X-Debbugs-Cc: mnalis-debianbug@voyager.hr, Debian Security Team <team@security.debian.org>
"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."
While it does not affect all users of ssh-agent, it does affect many of them
and commonly suggested workaround (using jumphosts instead of agent forwarding)
is not applicable to many use cases (git push over ssh, using
libpam-ssh-agent-auth, etc.)
https://security-tracker.debian.org/tracker/CVE-2023-38408 indicates that
the new fixed version 1:9.3p2-1 has been uploaded in sid and trixie, however
bookworm (stable) and bullseye (oldstable) still have no security fix since
CVE release on 2023-07-20.
(workaround by pinning fixed version from trixie is not possible, due to
significant libraries clash; and there are no Debian backports either)
-- System Information:
Debian Release: 11.7
APT prefers oldstable-updates
APT policy: (500, 'oldstable-updates'), (500, 'oldstable-security'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Kernel: Linux 5.10.0-23-amd64 (SMP w/1 CPU thread)
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages openssh-client depends on:
ii adduser 3.118
ii dpkg 1.20.12
ii libc6 2.31-13+deb11u6
ii libedit2 3.1-20210910-1
ii libfido2-1 1.6.0-2
ii libgssapi-krb5-2 1.18.3-6+deb11u3
ii libselinux1 3.1-3
ii libssl1.1 1.1.1n-0+deb11u5
ii passwd 1:4.8.1-1
ii zlib1g 1:1.2.11.dfsg-2+deb11u2
Versions of packages openssh-client recommends:
pn xauth <none>
Versions of packages openssh-client suggests:
pn keychain <none>
pn libpam-ssh <none>
pn monkeysphere <none>
pn ssh-askpass <none>
-- no debconf information
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