CVE-2023-26604

NameCVE-2023-26604
Descriptionsystemd before 247 does not adequately block local privilege escalation for some Sudo configurations, e.g., plausible sudoers files in which the "systemctl status" command may be executed. Specifically, systemd does not set LESSSECURE to 1, and thus other programs may be launched from the less program. This presents a substantial security risk when running systemctl from Sudo, because less executes as root when the terminal size is too small to show the complete systemctl output.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3377-1, ELA-916-1, ELA-917-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
systemd (PTS)jessie, jessie (lts)215-17+deb8u15fixed
stretch (security)232-25+deb9u14vulnerable
stretch (lts), stretch232-25+deb9u17fixed
buster, buster (lts)241-7~deb10u11fixed
buster (security)241-7~deb10u10fixed
bullseye247.3-7+deb11u5fixed
bullseye (security)247.3-7+deb11u6fixed
bookworm252.30-1~deb12u2fixed
sid, trixie256.7-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
systemdsourcejessie215-17+deb8u15ELA-917-1
systemdsourcestretch232-25+deb9u16ELA-916-1
systemdsourcebuster241-7~deb10u9DLA-3377-1
systemdsource(unstable)247.1-2

Notes

https://medium.com/%40zenmoviefornotification/saidov-maxim-cve-2023-26604-c1232a526ba7
https://github.com/systemd/systemd/blob/main/NEWS#L4335-L4340
https://blog.compass-security.com/2012/10/dangerous-sudoers-entries-part-2-insecure-functionality/

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