# CVE-2010-4344

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.

- Page: https://www.vulneraibility.com/cve/CVE-2010-4344
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2022-03-25; CISA due date 2022-04-15
- EPSS: 71.71% (percentile 99.4)
- Public exploit code: 2 on Exploit-DB · 1 Metasploit module (first 2010-12-11)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-07)
- Weakness: CWE-787
- Published: 2010-12-14

## Affected

- exim:exim
- opensuse:opensuse
- debian:debian_linux
- canonical:ubuntu_linux

## References

- [advisory] http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00003.html
- [other] http://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html
- [other] http://bugs.exim.org/show_bug.cgi?id=787
- [other] http://www.securitytracker.com/id?1024858
- [advisory] http://www.redhat.com/support/errata/RHSA-2010-0970.html
- [other] http://www.vupen.com/english/advisories/2010/3186
- [other] http://www.securityfocus.com/bid/45308
- [other] http://www.metasploit.com/modules/exploit/unix/smtp/exim4_string_format
- [other] http://atmail.com/blog/2010/atmail-6204-now-available/
- [advisory] http://secunia.com/advisories/42576
- [advisory] http://secunia.com/advisories/42587
- [other] https://bugzilla.redhat.com/show_bug.cgi?id=661756
- [other] http://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.html
- [advisory] http://secunia.com/advisories/40019
- [other] http://www.vupen.com/english/advisories/2010/3172
- [advisory] http://www.kb.cert.org/vuls/id/682457
- [other] http://www.vupen.com/english/advisories/2010/3181
- [advisory] http://secunia.com/advisories/42586
- [other] http://www.vupen.com/english/advisories/2010/3317
- [advisory] http://www.ubuntu.com/usn/USN-1032-1
- [other] http://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.html
- [other] http://www.osvdb.org/69685
- [other] http://www.securityfocus.com/archive/1/515172/100/0/threaded
- [other] http://www.theregister.co.uk/2010/12/11/exim_code_execution_peril/
- [other] http://www.vupen.com/english/advisories/2010/3246
- [other] http://www.vupen.com/english/advisories/2010/3204
- [other] http://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6b
- [advisory] http://www.debian.org/security/2010/dsa-2131
- [other] http://www.vupen.com/english/advisories/2010/3171
- [advisory] http://secunia.com/advisories/42589
- [other] http://openwall.com/lists/oss-security/2010/12/10/1
- [other] http://www.openwall.com/lists/oss-security/2021/05/04/7
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-4344

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.