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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…
Critical9.8Known exploitedEPSS 71.7%
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Exim Heap-Based Buffer Overflow Vulnerability.
- Added
- 25 Mar 2022
- Fix due (US federal)
- 15 Apr 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 71.7% · top 0.6% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (33)
- SUSE-SA:2010:059 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- [exim-dev] 20101207 Remote root vulnerability in Exim (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://bugs.exim.org/show_bug.cgi?id=787 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1024858 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- RHSA-2010:0970 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- ADV-2010-3186 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 45308 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://www.metasploit.com/modules/exploit/unix/smtp/exim4_string_format (opens in a new tab)x_refsource_MISCx_transferred
- http://atmail.com/blog/2010/atmail-6204-now-available/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- 42576 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 42587 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=661756 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [exim-dev] 20101210 Re: Remote root vulnerability in Exim (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 40019 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2010-3172 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- VU#682457 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- ADV-2010-3181 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 42586 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2010-3317 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- USN-1032-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 69685 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 20101213 Exim security issue in historical release (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- http://www.theregister.co.uk/2010/12/11/exim_code_execution_peril/ (opens in a new tab)x_refsource_MISCx_transferred
- ADV-2010-3246 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- ADV-2010-3204 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- http://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6b (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-2131 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- ADV-2010-3171 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 42589 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- [oss-security] 20101210 Exim remote root (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-4344 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2010-4344)Record last updated .