CVE-2022-37451

HIGH
Published Aug 6, 20223y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Aug 6, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-763

Affected Products 3

VendorProductVersionRange
eximexim* <4.96
fedoraprojectfedora35any
fedoraprojectfedora36any

References 10

  • cwe.mitre.org https://cwe.mitre.org/data/definitions/762.html
    Third Party Advisory
  • github.com https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42
    PatchThird Party Advisory
  • github.com https://github.com/Exim/exim/compare/exim-4.95...exim-4.96
    Release NotesThird Party Advisory
  • github.com https://github.com/Exim/exim/wiki/EximSecurity
    Release NotesThird Party Advisory
  • github.com https://github.com/ivd38/exim_invalid_free
    ExploitPatchThird Party Advisory
  • lists.exim.org https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html
    Mailing ListRelease NotesVendor Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LETR5CVDPFOFQHXCJP6NFLG52JZHQYDY/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XSWDF4QEXD4TDWQLYQOWCHBJKTDQR4Z7/
  • exim.org https://www.exim.org/static/doc/security/
    Vendor Advisory
  • openwall.com https://www.openwall.com/lists/oss-security/2022/08/06/1
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42
    PatchThird Party Advisory
  • github.com https://github.com/ivd38/exim_invalid_free
    ExploitPatchThird Party Advisory