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Man-in-the-middle arbitrary code execution in Debian’s apt

lists.debian.org via lobste.rs original 
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-6607-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
November 04, 2026                     https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : apt
CVE ID         : CVE-2026-109518

Max Justicz discovered a vulnerability in the APT package manager. APT
can merge two different package downloads after an HTTP redirect gives
them the same URI. Improper file handling when resuming an HTTP download
allows a man-in-the-middle attacker to replace a package after
verification, resulting in the execution of arbitrary code as root.

For the stable distribution (trixie), this problem has been fixed in
version 3.0.4. Additionally this update addresses several out-of-bounds
access issues.

We recommend that you upgrade your apt packages.

For the detailed security status of apt please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/apt

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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