CVE-2022-37451
HIGHExim < 4.96 - Use-After-Free in PAM Conversation Handler
Title source: llmDescription
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.
References (10)
Core 10
Core References
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/Exim/exim/wiki/EximSecurity
Vendor Advisory x_refsource_misc
https://www.exim.org/static/doc/security/
Exploit, Patch, Third Party Advisory x_refsource_misc
https://github.com/ivd38/exim_invalid_free
Mailing List, Third Party Advisory x_refsource_misc
https://www.openwall.com/lists/oss-security/2022/08/06/1
Mailing List, Release Notes, Vendor Advisory x_refsource_misc
https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html
Third Party Advisory x_refsource_misc
https://cwe.mitre.org/data/definitions/762.html
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/Exim/exim/compare/exim-4.95...exim-4.96
Patch, Third Party Advisory x_refsource_misc
https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LETR5CVDPFOFQHXCJP6NFLG52JZHQYDY/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XSWDF4QEXD4TDWQLYQOWCHBJKTDQR4Z7/
Scores
CVSS v3
7.5
EPSS
0.0255
EPSS Percentile
82.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-763
Status
published
Products (3)
exim/exim
< 4.96
fedoraproject/fedora
35
fedoraproject/fedora
36
Published
Aug 06, 2022
Tracked Since
Feb 18, 2026