CVEs / CVE-2010-4344
CVE-2010-4344: Exim Heap-Based Buffer Overflow Vulnerability
- Known exploited in the CISA KEV catalog since 25 Mar 2022
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 71.7% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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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.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
| In CISA KEV since | 25 Mar 2022 |
|---|---|
| Due date for US federal agencies | 15 Apr 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2010-4344 on NVD
- CVE-2010-4344 in the CISA KEV catalog
- CVE-2010-4344 on OSV
- http://atmail.com/blog/2010/atmail-6204-now-available/ Broken Link
- http://bugs.exim.org/show_bug.cgi?id=787 Issue Tracking, Patch
- http://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6b Mailing List, Patch
- http://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.html Mailing List, Patch
- http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00003.html Mailing List, Third Party Advisory
- http://openwall.com/lists/oss-security/2010/12/10/1 Mailing List, Third Party Advisory
- http://secunia.com/advisories/40019 Broken Link, Vendor Advisory
- http://secunia.com/advisories/42576 Broken Link, Vendor Advisory
- http://secunia.com/advisories/42586 Broken Link, Vendor Advisory
- http://secunia.com/advisories/42587 Broken Link, Vendor Advisory
- http://secunia.com/advisories/42589 Broken Link, Vendor Advisory
- http://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.html Broken Link
- http://www.debian.org/security/2010/dsa-2131 Mailing List, Third Party Advisory
- http://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html Exploit, Mailing List
- http://www.kb.cert.org/vuls/id/682457 Third Party Advisory, US Government Resource
- http://www.metasploit.com/modules/exploit/unix/smtp/exim4_string_format Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/04/7 Exploit, Mailing List
- http://www.osvdb.org/69685 Broken Link, Exploit, Patch
- http://www.redhat.com/support/errata/RHSA-2010-0970.html Broken Link
- http://www.securityfocus.com/archive/1/515172/100/0/threaded Broken Link, Third Party Advisory, VDB Entry
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.