| Name | CVE-2018-5709 |
| Description | An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable "dbentry->n_key_data" in kadmin/dbutil/dump.c that can store 16-bit data but unknowingly the developer has assigned a "u4" variable to it, which is for 32-bit data. An attacker can use this vulnerability to affect other artifacts of the database as we know that a Kerberos database dump file contains trusted data. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 889684 |
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+deb8u8 | vulnerable |
| stretch (security) | 1.15-1+deb9u3 | vulnerable |
| stretch (lts), stretch | 1.15-1+deb9u5 | vulnerable |
| buster | 1.17-3+deb10u4 | vulnerable |
| buster (security) | 1.17-3+deb10u6 | vulnerable |
| bullseye | 1.18.3-6+deb11u4 | vulnerable |
| bullseye (security) | 1.18.3-6+deb11u3 | vulnerable |
| bookworm | 1.20.1-2+deb12u1 | vulnerable |
| trixie | 1.20.1-5 | vulnerable |
| sid | 1.20.1-6 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| krb5 | source | (unstable) | (unfixed) | unimportant | | 889684 |
Notes
https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Integer%20Overflow
non-issue, codepath is only run on trusted input, potential integer
overflow is non-issue