| Name | CVE-2023-34966 |
| Description | An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition. |
| 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-5477-1, DSA-5647-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| samba (PTS) | buster | 2:4.9.5+dfsg-5+deb10u3 | vulnerable |
| buster (security) | 2:4.9.5+dfsg-5+deb10u5 | vulnerable |
| bullseye | 2:4.13.13+dfsg-1~deb11u5 | vulnerable |
| bullseye (security) | 2:4.13.13+dfsg-1~deb11u6 | fixed |
| bookworm, bookworm (security) | 2:4.17.12+dfsg-0+deb12u1 | fixed |
| trixie | 2:4.19.5+dfsg-1 | fixed |
| sid | 2:4.19.6+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| samba | source | bullseye | 2:4.13.13+dfsg-1~deb11u6 | | DSA-5647-1 | |
| samba | source | bookworm | 2:4.17.10+dfsg-0+deb12u1 | | DSA-5477-1 | |
| samba | source | (unstable) | 2:4.18.5+dfsg-1 | | | |
Notes
[buster] - samba <ignored> (spotlight enabled in 4.13.13+dfsg-1 - bullseye)
https://www.samba.org/samba/security/CVE-2023-34966.html
severity:unimportant for buster backwards, but we don't have suite-specific severity annotations