Simon Ruderich

**Name of the Vulnerable Software and Affected Versions** Advanced Package Tool (APT) versions 0.8.11 through 0.8.15.10 Advanced Package Tool (APT) versions 0.8.16 before 0.8.16~exp13 **Description** The issue allows man-in-the-middle attackers to install arbitrary packages by preventing a user from downloading the new InRelease file. This leaves the original InRelease file active, making it more difficult to detect that the Packages file is modified and unsigned. The `pkgAcqMetaClearSig::Failed` method in `apt-pkg/acquire-item.cc` is involved in this issue. **Recommendations** For Advanced Package Tool (APT) versions 0.8.11 through 0.8.15.10, update to version 0.8.16~exp13 or later. For Advanced Package Tool (APT) versions 0.8.16 before 0.8.16~exp13, update to version 0.8.16~exp13 or later.