CVE-2021-35938

NameCVE-2021-35938
DescriptionA symbolic link issue was found in rpm. It occurs when rpm sets the desired permissions and credentials after installing a file. A local unprivileged user could use this flaw to exchange the original file with a symbolic link to a security-critical file and escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs990543

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
rpm (PTS)buster4.14.2.1+dfsg1-1vulnerable
bullseye4.16.1.2+dfsg1-3vulnerable
bookworm, sid4.17.1.1+dfsg-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
rpmsource(unstable)(unfixed)990543

Notes

[bullseye] - rpm <ignored> (Minor issue)
[buster] - rpm <ignored> (Minor issue)
[stretch] - rpm <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=1964114

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