| Name | CVE-2017-7562 |
| Description | An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| krb5 (PTS) | jessie, jessie (lts) | 1.12.1+dfsg-19+deb8u9 | fixed |
| stretch (security) | 1.15-1+deb9u3 | fixed |
| stretch (lts), stretch | 1.15-1+deb9u6 | fixed |
| buster, buster (lts) | 1.17-3+deb10u7 | fixed |
| buster (security) | 1.17-3+deb10u6 | fixed |
| bullseye (security), bullseye | 1.18.3-6+deb11u5 | fixed |
| bookworm (security), bookworm | 1.20.1-2+deb12u2 | fixed |
| sid, trixie | 1.21.3-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| krb5 | source | (unstable) | (not affected) | | | |
Notes
- krb5 <not-affected> (Vulnerable code introduced later, cf. #873281)
https://github.com/krb5/krb5/pull/694
https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2
https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196
https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627d