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TI-2010-04077 Aliases CVE-2010-4344GHSA-mvgg-qcrq-7wr8

Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70…

Priority CRITICAL 100Exploited in the wildCWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a large message containing crafted headers, leading to improper rejection logging.

Why it matters now

Exploitation Active In CISA KEV since 2022-03-25CISA due date 2022-04-15
EPSS 0.71706 99th percentileScored 2026-11-07
Public exploit Yes 4 exploit referencesTagged by NVD
Fix Fixed Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*before 4.70VulnerableExim
cpe:2.3:o:opensuse:opensuse:11.1:*:*:*:*:*:*:*11.1VulnerableopenSUSE
cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:*11.2VulnerableopenSUSE
cpe:2.3:o:opensuse:opensuse:11.3:*:*:*:*:*:*:*11.3VulnerableopenSUSE
cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*5.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*6.06VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:-:*:*:*8.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:*9.10VulnerableCanonical
  • cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:* Versions before 4.70 Vulnerable ·Exim
  • cpe:2.3:o:opensuse:opensuse:11.1:*:*:*:*:*:*:* Versions 11.1 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:* Versions 11.2 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:opensuse:11.3:*:*:*:*:*:*:* Versions 11.3 Vulnerable ·openSUSE
  • cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:* Versions 6.06 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:-:*:*:* Versions 8.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:* Versions 9.10 Vulnerable ·Canonical

Remediation

Red Hat 1 advisory

  • RHSA-2010:0970 Released 2010-12-10 · Red Hat rating Critical
    exim security update
    • Red Hat Enterprise Linux (v. 5 server) exim-4.63-5.el5_5.2, exim-4.63-5.el5_5.2.i386, exim-4.63-5.el5_5.2.ia64 +9
    • Red Hat Enterprise Linux AS EUS (v. 4.7) exim-4.43-1.RHEL4.5.el4_7.1, exim-4.43-1.RHEL4.5.el4_7.1.i386, exim-4.43-1.RHEL4.5.el4_7.1.ia64 +13
    • Red Hat Enterprise Linux AS version 4 exim-4.43-1.RHEL4.5.el4_8.1, exim-4.43-1.RHEL4.5.el4_8.1.i386, exim-4.43-1.RHEL4.5.el4_8.1.ia64 +13
    • Red Hat Enterprise Linux Desktop (v. 5 client) exim-4.63-5.el5_5.2, exim-4.63-5.el5_5.2.i386, exim-mon-4.63-5.el5_5.2 +3
    • Red Hat Enterprise Linux Desktop version 4 exim-4.43-1.RHEL4.5.el4_8.1, exim-4.43-1.RHEL4.5.el4_8.1.i386, exim-doc-4.43-1.RHEL4.5.el4_8.1 +5
    • Red Hat Enterprise Linux ES EUS (v. 4.7) exim-4.43-1.RHEL4.5.el4_7.1, exim-4.43-1.RHEL4.5.el4_7.1.i386, exim-4.43-1.RHEL4.5.el4_7.1.ia64 +9
    • Red Hat Enterprise Linux ES version 4 exim-4.43-1.RHEL4.5.el4_8.1, exim-4.43-1.RHEL4.5.el4_8.1.i386, exim-4.43-1.RHEL4.5.el4_8.1.ia64 +9
    • Red Hat Enterprise Linux EUS (v. 5.3 server) exim-4.63-3.el5_3.1, exim-4.63-3.el5_3.1.i386, exim-4.63-3.el5_3.1.ia64 +9
    • Red Hat Enterprise Linux EUS (v. 5.4 server) exim-4.63-3.el5_4.1, exim-4.63-3.el5_4.1.i386, exim-4.63-3.el5_4.1.ia64 +9
    • Red Hat Enterprise Linux WS version 4 exim-4.43-1.RHEL4.5.el4_8.1, exim-4.43-1.RHEL4.5.el4_8.1.i386, exim-4.43-1.RHEL4.5.el4_8.1.ia64 +9

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2010:0970
Red Hat Enterprise Linux AS EUS (v. 4.7)Fixed RHSA-2010:0970
Red Hat Enterprise Linux AS version 4Fixed RHSA-2010:0970
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2010:0970
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2010:0970
Red Hat Enterprise Linux ES EUS (v. 4.7)Fixed RHSA-2010:0970
Red Hat Enterprise Linux ES version 4Fixed RHSA-2010:0970
Red Hat Enterprise Linux EUS (v. 5.3 server)Fixed RHSA-2010:0970
Red Hat Enterprise Linux EUS (v. 5.4 server)Fixed RHSA-2010:0970
Red Hat Enterprise Linux WS version 4Fixed RHSA-2010:0970

Timeline

  1. 2022-03-25 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2010-4344
  3. 2026-10-03 Alias added: GHSA-mvgg-qcrq-7wr8

References

Exploit 4

Patch 3

Advisory 13

Other 4

  • TI-2019-12627 Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than… KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-07471 OS command injection in exim KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-04965 An issue was discovered in the base64d function in the SMTP listener in Exim before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2010-04078 Exim 4.72 and earlier allows local users to gain privileges by leveraging the ability of… KEVCVSS 3.1HIGH 7.8
  • TI-2025-19707 SQL injection in Exim CVSS 3.1CRITICAL 9.8
  • TI-2023-22483 Out-of-bounds write in Exim CVSS 3.0CRITICAL 9.8
See all 69 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences