| Name | CVE-2022-42898 |
| Description | PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug." |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3206-1, DLA-3213-1, DSA-5286-1, DSA-5287-1 |
| Debian Bugs | 1024187, 1024267 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| heimdal (PTS) | 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 | |
| krb5 (PTS) | bullseye (security), bullseye | 1.18.3-6+deb11u5 | fixed |
| bookworm, bookworm (security) | 1.20.1-2+deb12u2 | fixed | |
| sid, trixie | 1.21.3-3 | fixed | |
| samba (PTS) | bullseye (security), bullseye | 2:4.13.13+dfsg-1~deb11u6 | vulnerable |
| bookworm, bookworm (security) | 2:4.17.12+dfsg-0+deb12u1 | fixed | |
| trixie | 2:4.21.2+dfsg-3 | fixed | |
| sid | 2:4.21.2+dfsg-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| heimdal | source | buster | 7.5.0+dfsg-3+deb10u1 | DLA-3206-1 | ||
| heimdal | source | bullseye | 7.7.0+dfsg-2+deb11u2 | DSA-5287-1 | ||
| heimdal | source | (unstable) | 7.8.git20221115.a6cf945+dfsg-1 | 1024187 | ||
| krb5 | source | buster | 1.17-3+deb10u5 | DLA-3213-1 | ||
| krb5 | source | bullseye | 1.18.3-6+deb11u3 | DSA-5286-1 | ||
| krb5 | source | (unstable) | 1.20.1-1 | 1024267 | ||
| samba | source | (unstable) | 2:4.17.3+dfsg-1 |
[bullseye] - samba <ignored> (Domain controller functionality is EOLed, see DSA DSA-5477-1)
[buster] - samba <ignored> (Domain controller functionality is EOLed, see DSA-5015-1)
https://www.samba.org/samba/security/CVE-2022-42898.html
https://bugzilla.samba.org/show_bug.cgi?id=15203
samba: only exploitable in 32-bit systems, according to upstream advisory
MIT-krb5: https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 (master)
MIT-krb5: https://github.com/krb5/krb5/commit/b99de751dd35360c0fccac74a40f4a60dbf1ceea (krb5-1.20.1-final)
MIT-krb5: https://github.com/krb5/krb5/commit/4e661f0085ec5f969c76c0896a34322c6c432de4 (krb5-1.19.4-final)
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
Heimdal: https://github.com/heimdal/heimdal/commit/0c56257bdac80da015878fffdb0f8a42b8d73246 (heimdal-7.7.1)
Heimdal regression: https://github.com/heimdal/heimdal/pull/1025
possible samba 4.13,4.15 regression: https://bugzilla.samba.org/show_bug.cgi?id=15243
and https://bugs.launchpad.net/ubuntu/+source/samba/+bug/2003867