| Name | CVE-2019-12098 |
| Description | In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.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 | DSA-4455-1 |
| Debian Bugs | 929064 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| heimdal (PTS) | jessie, jessie (lts) | 1.6~rc2+dfsg-9+deb8u3 | vulnerable |
| stretch (security) | 7.1.0+dfsg-13+deb9u3 | fixed |
| stretch (lts), stretch | 7.1.0+dfsg-13+deb9u4 | fixed |
| buster (security), buster, buster (lts) | 7.5.0+dfsg-3+deb10u2 | fixed |
| bullseye (security), bullseye | 7.7.0+dfsg-2+deb11u3 | fixed |
| bookworm | 7.8.git20221117.28daf24+dfsg-2 | fixed |
| sid, trixie | 7.8.git20221117.28daf24+dfsg-8 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| heimdal | source | wheezy | (unfixed) | end-of-life | | |
| heimdal | source | stretch | 7.1.0+dfsg-13+deb9u3 | | DSA-4455-1 | |
| heimdal | source | (unstable) | 7.5.0+dfsg-3 | | | 929064 |
Notes
Fixed by: https://github.com/heimdal/heimdal/commit/2f7f3d9960aa6ea21358bdf3687cee5149aa35cf (7.6.0)
Introduced by: https://github.com/heimdal/heimdal/commit/a1ef548600c5bb51cf52a9a9ea12676506ede19f (1.4.0)
[jessie] - heimdal <ignored> (jessie's heimdal anonymous pkinit implementation is significantly different to later releases that issued tickets do not pass the additional validation added by the fix. In particular, the required PKINIT-KX reponse is missing and thus validation fails. This is rectified in https://github.com/heimdal/heimdal/pull/110. As such, this is a breaking change on a networked application. We recommend disabling anonymous tickets on relevant KDCs.)