Buffer overflow in Exim
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…
Vulnerability class: Buffer Overflow
EPSS: 0.719 (99.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Exim
- Canonical Ubuntu_linux — versions 6.06, 8.04, 9.10
- Debian Debian_linux — versions 5.0
- Opensuse — versions 11.1, 11.2, 11.3
- N/a — versions n/a
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Exploit, Mailing List)
- secalert@redhat.com (x_refsource_CONFIRM, Patch, Issue Tracking)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK, Broken Link)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Broken Link)
- secalert@redhat.com (vdb-entry, Broken Link, x_refsource_VUPEN, Vendor Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (x_refsource_CONFIRM, Broken Link)
- secalert@redhat.com (x_refsource_SECUNIA, Broken Link, Vendor Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2010-4344?
- CVE-2010-4344 is a critical-severity vulnerability in Exim, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2010-12-14.
- How severe is CVE-2010-4344?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2010-4344 known to be exploited?
- Yes. CVE-2010-4344 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating it is being actively exploited. 10 public proof-of-concept repositories are indexed.