Description
methods/https.cc in apt before 0.8.11 accepts connections when the certificate host name fails validation and Verify-Host is enabled, which allows man-in-the-middle attackers to obtain repository credentials via unspecified vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | apt | 0.8.11 | — |
| Debian 13 | apt | 0.8.11 | — |
| Debian 12 | apt | 0.8.11 | — |
| Debian 6.0 | apt | 0.8.10.3+squeeze2 | DLA-0005-1 |
Advisories 1
- DLA-0005-1 apt - security update Debian Security (DSA / DLA) · Mar 9, 2026