{"id":"CVE-2010-4344","url":"https://www.cyber-defence.io/tools/cve/CVE-2010-4344","generatedAt":"2026-10-31T23:40:51.984Z","title":"Exim Heap-Based Buffer Overflow Vulnerability","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.","published":"2010-12-14T16:00:04.000Z","lastModified":"2026-06-16T23:24:36.000Z","status":"Analyzed","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["exim/exim","opensuse/opensuse","debian/debian linux","canonical/ubuntu linux"],"epss":{"score":0.71706,"percentile":0.99422,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2022-03-25","dueDate":"2022-04-15","knownRansomwareCampaignUse":"Unknown","notes":"Apply updates per vendor instructions.\nhttps://nvd.nist.gov/vuln/detail/CVE-2010-4344"},"exploits":{"count":2,"verified":true,"firstPublished":"2010-12-11","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":16925,"kind":"exploit","title":"Exim4 < 4.69 - string_format Function Heap Buffer Overflow (Metasploit)","url":"https://www.exploit-db.com/exploits/16925","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/16925.rb","file":"exploits/linux/remote/16925.rb","published":"2010-12-16","added":"2010-12-16","updated":"2011-03-06","author":"Metasploit","type":"remote","platform":"linux","port":null,"verified":true,"codes":["CVE-2010-4345","CVE-2010-4344","OSVDB-69685"],"tags":"Metasploit Framework (MSF)","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null},{"edbId":15725,"kind":"exploit","title":"Exim 4.63 - Remote Command Execution","url":"https://www.exploit-db.com/exploits/15725","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/15725.pl","file":"exploits/linux/remote/15725.pl","published":"2010-12-11","added":"2010-12-11","updated":"2016-12-04","author":"kingcope","type":"remote","platform":"linux","port":null,"verified":true,"codes":["CVE-2010-4344","OSVDB-69685"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":"http://www.exploit-db.com/screenshots/idlt16000/15725.png","referenceUrl":null}]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 15 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"ftp://ftp.exim.org/pub/exim/ChangeLogs/ChangeLog-4.70","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://atmail.com/blog/2010/atmail-6204-now-available/","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://bugs.exim.org/show_bug.cgi?id=787","tags":["Issue Tracking","Patch"],"source":"secalert@redhat.com"},{"url":"http://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6b","tags":["Mailing List","Patch"],"source":"secalert@redhat.com"},{"url":"http://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.html","tags":["Mailing List","Patch"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00003.html","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://openwall.com/lists/oss-security/2010/12/10/1","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/40019","tags":["Broken Link","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/42576","tags":["Broken Link","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/42586","tags":["Broken Link","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/42587","tags":["Broken Link","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/42589","tags":["Broken Link","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.html","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2010/dsa-2131","tags":["Mailing List","Third Party 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Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/42576","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/42586","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/42587","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/42589","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.html","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2010/dsa-2131","tags":["Mailing List","Third Party 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Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/515172/100/0/threaded","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/45308","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1024858","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.theregister.co.uk/2010/12/11/exim_code_execution_peril/","tags":["Press/Media Coverage"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1032-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2010/3171","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2010/3172","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2010-4344","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}