| Name | CVE-2015-2694 |
| Description | The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | ELA-77-1 |
| Debian Bugs | 783557 |
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 | wheezy | 1.10.1+dfsg-5+deb7u10 | | ELA-77-1 | |
| krb5 | source | jessie | 1.12.1+dfsg-19+deb8u3 | | | |
| krb5 | source | (unstable) | 1.12.1+dfsg-20 | | | 783557 |
Notes
[wheezy] - krb5 <no-dsa> (Minor issue and can be fixed in a future DSA)
[squeeze] - krb5 <no-dsa> (Minor issue and can be fixed in a future DSA)
Upstream ticket: http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160
Upstream commit: https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604
wheezy marked as no-dsa since OTP plugin not present. But the issue
might affect any out-of-tree plugins with similar bug as the OTP
has. Thus basicaly only krb5/1.12 is affected.