| Name | CVE-2023-42118 |
| Description | Exim libspf2 Integer Underflow Remote Code Execution Vulnerability |
| 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 | 1053870 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libspf2 (PTS) | jessie, jessie (lts) | 1.2.10-5+deb8u2 | vulnerable |
| stretch (security), stretch (lts), stretch | 1.2.10-7+deb9u2 | vulnerable |
| buster, buster (security) | 1.2.10-7.1~deb10u1 | vulnerable |
| bullseye (security), bullseye | 1.2.10-7.1~deb11u1 | vulnerable |
| bookworm | 1.2.10-7.2 | vulnerable |
| trixie | 1.2.10-8 | vulnerable |
| sid | 1.2.10-8.2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libspf2 | source | jessie | (unfixed) | end-of-life | | |
| libspf2 | source | (unstable) | (unfixed) | | | 1053870 |
Notes
[bookworm] - libspf2 <postponed> (Revisit once upstream and ZDI status is clarfied)
[bullseye] - libspf2 <postponed> (Revisit once upstream and ZDI status is clarfied)
[buster] - libspf2 <postponed> (Revisit once upstream and ZDI status is clarfied)
https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
https://bugs.exim.org/show_bug.cgi?id=3032
https://www.openwall.com/lists/oss-security/2023/09/29/5
https://www.openwall.com/lists/oss-security/2023/10/01/4
https://exim.org/static/doc/security/CVE-2023-zdi.txt
https://lists.exim.org/lurker/message/20231004.080103.8c98192c.en.html
Potentially same issue as: https://github.com/shevek/libspf2/issues/45
https://github.com/shevek/libspf2/pull/44
The potentially related (but unknown if exploitable) integer overflow flaw from pull/44
is fixed with libspf2/1.2.10-8. There have been 1. no proofs it is exploitable, and the
finder clarifies as "ut I haven't been able to get it to do anything after that because
another buffer fills up." and 2. that this is the same issue as CVE-2023-42118 .
[stretch] - libspf2 <postponed> (Revisit once upstream and ZDI status is clarfied)