| Name | CVE-2022-37451 |
| Description | Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| exim4 (PTS) | jessie, jessie (lts) | 4.84.2-2+deb8u12 | fixed |
| stretch (security) | 4.89-2+deb9u8 | fixed |
| stretch (lts), stretch | 4.89-2+deb9u13 | fixed |
| buster, buster (lts) | 4.92-8+deb10u10 | fixed |
| buster (security) | 4.92-8+deb10u9 | fixed |
| bullseye | 4.94.2-7+deb11u3 | fixed |
| bullseye (security) | 4.94.2-7+deb11u4 | fixed |
| bookworm | 4.96-15+deb12u6 | fixed |
| bookworm (security) | 4.96-15+deb12u5 | fixed |
| sid, trixie | 4.98-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| exim4 | source | jessie | (not affected) | | | |
| exim4 | source | stretch | (not affected) | | | |
| exim4 | source | buster | (not affected) | | | |
| exim4 | source | bullseye | (not affected) | | | |
| exim4 | source | (unstable) | 4.95-4 | | | |
Notes
[bullseye] - exim4 <not-affected> (Vulnerable code not present)
[buster] - exim4 <not-affected> (Vulnerable code not present)
https://github.com/ivd38/exim_invalid_free
https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42 (exim-4.96-RC0)
Introduced in https://github.com/Exim/exim/commit/1e30b0199daf7a7a882458251a3dc10d45d4c7d1 (exim-4.95-RC0)
[stretch] - exim4 <not-affected> (Vulnerable code not present)
[jessie] - exim4 <not-affected> (Vulnerable code not present)