| Name | CVE-2023-3748 |
| Description | A flaw was found in FRRouting when parsing certain babeld unicast hello messages that are intended to be ignored. This issue may allow an attacker to send specially crafted hello messages with the unicast flag set, the interval field set to 0, or any TLV that contains a sub-TLV with the Mandatory flag set to enter an infinite loop and cause a denial of service. |
| 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 | 1042473 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| frr (PTS) | buster, buster (lts) | 7.5.1-1.1+deb10u3 | fixed |
| buster (security) | 7.5.1-1.1+deb10u2 | fixed |
| bullseye | 7.5.1-1.1+deb11u2 | fixed |
| bullseye (security) | 7.5.1-1.1+deb11u3 | fixed |
| bookworm (security), bookworm | 8.4.4-1.1~deb12u1 | vulnerable |
| trixie | 10.1.1-0.1 | fixed |
| sid | 10.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| frr | source | buster | (not affected) | | | |
| frr | source | bullseye | (not affected) | | | |
| frr | source | (unstable) | 9.1-0.1 | | | 1042473 |
Notes
[bullseye] - frr <not-affected> (The vulnerable code was introduced later)
[buster] - frr <not-affected> (The vulnerable code was introduced later)
https://github.com/FRRouting/frr/issues/11808
https://github.com/FRRouting/frr/pull/12950
https://github.com/FRRouting/frr/pull/12952
https://github.com/FRRouting/frr/commit/0a95d121ca8e1f43d41d952d6c82d111ca850085 (frr-8.5)