CVE-2022-37451

HIGH

Exim <4.96 - Memory Corruption

Title source: llm

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.

References (10)

[Release Notes, Third Party Advisory] https://github.com/Exim/exim/wiki/EximSecurity

[Vendor Advisory] https://www.exim.org/static/doc/security/

[Exploit, Patch, Third Party Advisory] https://github.com/ivd38/exim_invalid_free

[Mailing List, Third Party Advisory] https://www.openwall.com/lists/oss-security/2022/08/06/1

[Mailing List, Release Notes, Vendor Advisory] https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html

[Third Party Advisory] https://cwe.mitre.org/data/definitions/762.html

[Release Notes, Third Party Advisory] https://github.com/Exim/exim/compare/exim-4.95...exim-4.96

[Patch, Third Party Advisory] https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42

View Patch ZIP pw:eip

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LETR5CVDPFOFQHXCJP6NFLG52JZHQYDY/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XSWDF4QEXD4TDWQLYQOWCHBJKTDQR4Z7/

Scores

CVSS v3 7.5

EPSS 0.0607

EPSS Percentile 90.8%

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