CVE-2022-37452

CRITICAL
Published Aug 7, 20223y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Aug 7, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

Description

Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
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-787 Out-of-bounds Write Memory Safety

Affected Products 2

VendorProductVersionRange
eximexim* <4.95
debiandebian_linux10.0any

References 7

  • github.com https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743
    PatchThird Party Advisory
  • github.com https://github.com/Exim/exim/compare/exim-4.94...exim-4.95
    PatchRelease NotesThird Party Advisory
  • github.com https://github.com/Exim/exim/wiki/EximSecurity
    Release NotesThird Party Advisory
  • github.com https://github.com/ivd38/exim_overflow
    ExploitPatchThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/08/msg00014.html
    Mailing ListThird Party Advisory
  • exim.org https://www.exim.org/static/doc/security/
    Vendor Advisory
  • openwall.com https://www.openwall.com/lists/oss-security/2022/08/06/8
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743
    PatchThird Party Advisory
  • github.com https://github.com/Exim/exim/compare/exim-4.94...exim-4.95
    PatchRelease NotesThird Party Advisory
  • github.com https://github.com/ivd38/exim_overflow
    ExploitPatchThird Party Advisory