Buffer overflow in Exim
CVE-2012-5671
Heap-based buffer overflow in the dkim_exim_query_dns_txt function in dkim.c in Exim 4.70 through 4.80, when DKIM support is enabled and acl_smtp_connect and acl_smtp_rcpt are not set to "warn control = dkim_disable_verify," allows remote attackers to execute arbitrary code via an email from a malicious DNS server.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v2 metric
CVSS v2 base score 6.8 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.084 (94.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.084 · newest: 0.084 · change: 0.000
Affected products
- Exim — versions 4.70, 4.71, 4.72
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secunia.com/advisories/51115 (third-party-advisory)
- www.openwall.com/lists/oss-security/2012/10/26/5 (mailing-list)
- secunia.com/advisories/51155 (third-party-advisory)
- lists.exim.org/lurker/message/20121026.080330.74b9147b.en.html (mailing-list)
- www.ubuntu.com/usn/USN-1618-1 (vendor-advisory)
- secunia.com/advisories/51098 (Vendor Advisory, third-party-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2012-October/090900.html (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2012-October/090963.html (vendor-advisory)
- secunia.com/advisories/51153 (third-party-advisory)
- osvdb.org/86616 (vdb-entry)
Frequently asked questions
- What is CVE-2012-5671?
- CVE-2012-5671 is a vulnerability in Exim, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2012-10-31.
- Is CVE-2012-5671 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.