DescriptionThe postinst script in ppp 2.4.4rel on Debian GNU/Linux allows local users to overwrite arbitrary files via a symlink attack on the (1) /tmp/probe-finished or (2) /tmp/ppp-errors temporary file.
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 Bugs509488

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ppp (PTS)buster, buster (security)2.4.7-2+4.1+deb10u1vulnerable
bookworm, sid2.4.9-1+1.1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


Package postinst isn't vulnerable, only .tmp files in /etc

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