01 Record

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

CriticalKEVPUBLISHEDCNA: redhat

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 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

03 Exploitation and scoring

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-03-25. Federal remediation due 2022-04-15.

SSVC decision

ExploitationactiveCISA reports credible evidence of active exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

71.90% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.4% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-16.

Red Hat severity

Critical. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2010-12-14 15:00Z15 YR AGO

Last updated

2025-10-22 00:05Z10 MO AGO

Reserved

2010-11-30

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-787Out-of-bounds WriteBase
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.1

Document digest

bf3213a2588a182a44fc2afc81f4dbadf3faaa9ad40f8c196b575d55d680b959

05 Affected products

VendorProductVersionsPlatforms

canonicalubuntu_linuxNot specified—

debiandebian_linuxNot specified—

eximeximNot specified—

opensuseopensuseNot specified—

redhatenterprise_linuxNot specified—

redhatrhel_eusNot specified—

06 References

lists.opensuse.orgSUSE-SA:2010:059http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00003.htmlvendor-advisoryx_refsource_SUSE
www.exim.org[exim-dev] 20101207 Remote root vulnerability in Eximhttp://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.htmlmailing-listx_refsource_MLIST
bugs.exim.orghttp://bugs.exim.org/show_bug.cgi?id=787x_refsource_CONFIRM
www.securitytracker.com1024858http://www.securitytracker.com/id?1024858vdb-entryx_refsource_SECTRACK
www.redhat.comRHSA-2010:0970http://www.redhat.com/support/errata/RHSA-2010-0970.htmlvendor-advisoryx_refsource_REDHAT
www.vupen.comADV-2010-3186http://www.vupen.com/english/advisories/2010/3186vdb-entryx_refsource_VUPEN
www.securityfocus.com45308http://www.securityfocus.com/bid/45308vdb-entryx_refsource_BID
www.metasploit.comhttp://www.metasploit.com/modules/exploit/unix/smtp/exim4_string_formatx_refsource_MISC
atmail.comhttp://atmail.com/blog/2010/atmail-6204-now-available/x_refsource_CONFIRM
secunia.com42576http://secunia.com/advisories/42576third-party-advisoryx_refsource_SECUNIA
secunia.com42587http://secunia.com/advisories/42587third-party-advisoryx_refsource_SECUNIA
bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=661756x_refsource_CONFIRM
lists.exim.org[exim-dev] 20101210 Re: Remote root vulnerability in Eximhttp://lists.exim.org/lurker/message/20101210.164935.385e04d0.en.htmlmailing-listx_refsource_MLIST
secunia.com40019http://secunia.com/advisories/40019third-party-advisoryx_refsource_SECUNIA
www.vupen.comADV-2010-3172http://www.vupen.com/english/advisories/2010/3172vdb-entryx_refsource_VUPEN
www.kb.cert.orgVU#682457http://www.kb.cert.org/vuls/id/682457third-party-advisoryx_refsource_CERT-VN
www.vupen.comADV-2010-3181http://www.vupen.com/english/advisories/2010/3181vdb-entryx_refsource_VUPEN
secunia.com42586http://secunia.com/advisories/42586third-party-advisoryx_refsource_SECUNIA
www.vupen.comADV-2010-3317http://www.vupen.com/english/advisories/2010/3317vdb-entryx_refsource_VUPEN
www.ubuntu.comUSN-1032-1http://www.ubuntu.com/usn/USN-1032-1vendor-advisoryx_refsource_UBUNTU
www.cpanel.nethttp://www.cpanel.net/2010/12/exim-remote-memory-corruption-vulnerability-notification-cve-2010-4344.htmlx_refsource_CONFIRM
www.osvdb.org69685http://www.osvdb.org/69685vdb-entryx_refsource_OSVDB
www.securityfocus.com20101213 Exim security issue in historical releasehttp://www.securityfocus.com/archive/1/515172/100/0/threadedmailing-listx_refsource_BUGTRAQ
www.theregister.co.ukhttp://www.theregister.co.uk/2010/12/11/exim_code_execution_peril/x_refsource_MISC
www.vupen.comADV-2010-3246http://www.vupen.com/english/advisories/2010/3246vdb-entryx_refsource_VUPEN
ftp.exim.orgftp://ftp.exim.org/pub/exim/ChangeLogs/ChangeLog-4.70x_refsource_CONFIRM
www.vupen.comADV-2010-3204http://www.vupen.com/english/advisories/2010/3204vdb-entryx_refsource_VUPEN
git.exim.orghttp://git.exim.org/exim.git/commit/24c929a27415c7cfc7126c47e4cad39acf3efa6bx_refsource_CONFIRM
www.debian.orgDSA-2131http://www.debian.org/security/2010/dsa-2131vendor-advisoryx_refsource_DEBIAN
www.vupen.comADV-2010-3171http://www.vupen.com/english/advisories/2010/3171vdb-entryx_refsource_VUPEN
secunia.com42589http://secunia.com/advisories/42589third-party-advisoryx_refsource_SECUNIA
openwall.com[oss-security] 20101210 Exim remote roothttp://openwall.com/lists/oss-security/2010/12/10/1mailing-listx_refsource_MLIST
www.openwall.com[oss-security] 20210504 21Nails: Multiple vulnerabilities in Eximhttp://www.openwall.com/lists/oss-security/2021/05/04/7mailing-listx_refsource_MLIST
www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2010-4344government-resource

01 Record index

CVE-2010-4344

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2010-4344

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References