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[USN-6560-1] OpenSSH vulnerabilities

Severity Critical
Affected Packages 24
CVEs 2
Info Packages Vulnerabilities

Several security issues were fixed in OpenSSH.

Fabian Bäumer, Marcus Brinkmann, Jörg Schwenk discovered that the SSH
protocol was vulnerable to a prefix truncation attack. If a remote attacker
was able to intercept SSH communications, extension negotiation messages
could be truncated, possibly leading to certain algorithms and features
being downgraded. This issue is known as the Terrapin attack. This update
adds protocol extensions to mitigate this issue. (CVE-2023-48795)

Luci Stanescu discovered that OpenSSH incorrectly added destination
constraints when smartcard keys were added to ssh-agent, contrary to
expectations. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.
(CVE-2023-28531)

Package Affected Version
pkg:deb/ubuntu/ssh?distro=mantic < 9.3p1-1ubuntu3.1
pkg:deb/ubuntu/ssh?distro=lunar < 9.0p1-1ubuntu8.6
pkg:deb/ubuntu/ssh?distro=jammy < 8.9p1-3ubuntu0.5
pkg:deb/ubuntu/ssh?distro=focal < 8.2p1-4ubuntu0.10
pkg:deb/ubuntu/ssh-askpass-gnome?distro=mantic < 9.3p1-1ubuntu3.1
pkg:deb/ubuntu/ssh-askpass-gnome?distro=lunar < 9.0p1-1ubuntu8.6
pkg:deb/ubuntu/ssh-askpass-gnome?distro=jammy < 8.9p1-3ubuntu0.5
pkg:deb/ubuntu/ssh-askpass-gnome?distro=focal < 8.2p1-4ubuntu0.10
pkg:deb/ubuntu/openssh-tests?distro=mantic < 9.3p1-1ubuntu3.1
pkg:deb/ubuntu/openssh-tests?distro=lunar < 9.0p1-1ubuntu8.6
pkg:deb/ubuntu/openssh-tests?distro=jammy < 8.9p1-3ubuntu0.5
pkg:deb/ubuntu/openssh-tests?distro=focal < 8.2p1-4ubuntu0.10
pkg:deb/ubuntu/openssh-sftp-server?distro=mantic < 9.3p1-1ubuntu3.1
pkg:deb/ubuntu/openssh-sftp-server?distro=lunar < 9.0p1-1ubuntu8.6
pkg:deb/ubuntu/openssh-sftp-server?distro=jammy < 8.9p1-3ubuntu0.5
pkg:deb/ubuntu/openssh-sftp-server?distro=focal < 8.2p1-4ubuntu0.10
pkg:deb/ubuntu/openssh-server?distro=mantic < 9.3p1-1ubuntu3.1
pkg:deb/ubuntu/openssh-server?distro=lunar < 9.0p1-1ubuntu8.6
pkg:deb/ubuntu/openssh-server?distro=jammy < 8.9p1-3ubuntu0.5
pkg:deb/ubuntu/openssh-server?distro=focal < 8.2p1-4ubuntu0.10
pkg:deb/ubuntu/openssh-client?distro=mantic < 9.3p1-1ubuntu3.1
pkg:deb/ubuntu/openssh-client?distro=lunar < 9.0p1-1ubuntu8.6
pkg:deb/ubuntu/openssh-client?distro=jammy < 8.9p1-3ubuntu0.5
pkg:deb/ubuntu/openssh-client?distro=focal < 8.2p1-4ubuntu0.10
ID
USN-6560-1
Severity
critical
Severity from
CVE-2023-28531
URL
https://ubuntu.com/security/notices/USN-6560-1
Published
2023-12-19T13:02:10
(9 months ago)
Modified
2023-12-19T13:02:10
(9 months ago)
Other Advisories
Type Package URL Namespace Name / Product Version Distribution / Platform Arch Patch / Fix
Affected pkg:deb/ubuntu/ssh?distro=mantic ubuntu ssh < 9.3p1-1ubuntu3.1 mantic
Affected pkg:deb/ubuntu/ssh?distro=lunar ubuntu ssh < 9.0p1-1ubuntu8.6 lunar
Affected pkg:deb/ubuntu/ssh?distro=jammy ubuntu ssh < 8.9p1-3ubuntu0.5 jammy
Affected pkg:deb/ubuntu/ssh?distro=focal ubuntu ssh < 8.2p1-4ubuntu0.10 focal
Affected pkg:deb/ubuntu/ssh-askpass-gnome?distro=mantic ubuntu ssh-askpass-gnome < 9.3p1-1ubuntu3.1 mantic
Affected pkg:deb/ubuntu/ssh-askpass-gnome?distro=lunar ubuntu ssh-askpass-gnome < 9.0p1-1ubuntu8.6 lunar
Affected pkg:deb/ubuntu/ssh-askpass-gnome?distro=jammy ubuntu ssh-askpass-gnome < 8.9p1-3ubuntu0.5 jammy
Affected pkg:deb/ubuntu/ssh-askpass-gnome?distro=focal ubuntu ssh-askpass-gnome < 8.2p1-4ubuntu0.10 focal
Affected pkg:deb/ubuntu/openssh-tests?distro=mantic ubuntu openssh-tests < 9.3p1-1ubuntu3.1 mantic
Affected pkg:deb/ubuntu/openssh-tests?distro=lunar ubuntu openssh-tests < 9.0p1-1ubuntu8.6 lunar
Affected pkg:deb/ubuntu/openssh-tests?distro=jammy ubuntu openssh-tests < 8.9p1-3ubuntu0.5 jammy
Affected pkg:deb/ubuntu/openssh-tests?distro=focal ubuntu openssh-tests < 8.2p1-4ubuntu0.10 focal
Affected pkg:deb/ubuntu/openssh-sftp-server?distro=mantic ubuntu openssh-sftp-server < 9.3p1-1ubuntu3.1 mantic
Affected pkg:deb/ubuntu/openssh-sftp-server?distro=lunar ubuntu openssh-sftp-server < 9.0p1-1ubuntu8.6 lunar
Affected pkg:deb/ubuntu/openssh-sftp-server?distro=jammy ubuntu openssh-sftp-server < 8.9p1-3ubuntu0.5 jammy
Affected pkg:deb/ubuntu/openssh-sftp-server?distro=focal ubuntu openssh-sftp-server < 8.2p1-4ubuntu0.10 focal
Affected pkg:deb/ubuntu/openssh-server?distro=mantic ubuntu openssh-server < 9.3p1-1ubuntu3.1 mantic
Affected pkg:deb/ubuntu/openssh-server?distro=lunar ubuntu openssh-server < 9.0p1-1ubuntu8.6 lunar
Affected pkg:deb/ubuntu/openssh-server?distro=jammy ubuntu openssh-server < 8.9p1-3ubuntu0.5 jammy
Affected pkg:deb/ubuntu/openssh-server?distro=focal ubuntu openssh-server < 8.2p1-4ubuntu0.10 focal
Affected pkg:deb/ubuntu/openssh-client?distro=mantic ubuntu openssh-client < 9.3p1-1ubuntu3.1 mantic
Affected pkg:deb/ubuntu/openssh-client?distro=lunar ubuntu openssh-client < 9.0p1-1ubuntu8.6 lunar
Affected pkg:deb/ubuntu/openssh-client?distro=jammy ubuntu openssh-client < 8.9p1-3ubuntu0.5 jammy
Affected pkg:deb/ubuntu/openssh-client?distro=focal ubuntu openssh-client < 8.2p1-4ubuntu0.10 focal
# CVE Description CVSS EPSS EPSS Trend (30 days) Affected Products Weaknesses Security Advisories Exploits PoC Pubblication Date Modification Date
# CVE Description CVSS EPSS EPSS Trend (30 days) Affected Products Weaknesses Security Advisories PoC Pubblication Date Modification Date