What is CVE-2012-2110?

CVE-2012-2110 is a vulnerability in OpenSSL, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2012-04-19.

Is CVE-2012-2110 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in OpenSSL

CVE-2012-2110

The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in OpenSSL before 0.9.8v, 1.0.0 before 1.0.0i, and 1.0.1 before 1.0.1a does not properly interpret integer data, which allows remote attackers to conduct buffer overflow attacks, and cause a denial of service (memory corruption) or possibly have unspecified other impact, via crafted DER data, as demonstrated by an X.509 certificate or an RSA public key.

Vulnerability class: Buffer Overflow

Published 2012-04-19 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.479 (98.9th percentile), scored 2026-10-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.479 · newest: 0.479 · change: 0.000

Affected products

OpenSSL — versions 1.0.0, 1.0.0a, 1.0.0b
Red Hat OpenSSL — versions 0.9.6-15, 0.9.6b-3, 0.9.7a-2

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

lists.opensuse.org/opensuse-security-announce/2012-05/msg00014.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2012-09/msg00007.html (vendor-advisory)
www-01.ibm.com/support/docview.wss
h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay (vendor-advisory)
lists.fedoraproject.org/pipermail/package-announce/2012-November/092905.html (vendor-advisory)
secunia.com/advisories/48899 (third-party-advisory)
archives.neohapsis.com/archives/fulldisclosure/2012-04/0209.html (mailing-list, Exploit)
rhn.redhat.com/errata/RHSA-2012-1308.html (vendor-advisory)
cvs.openssl.org/chngview
www.mandriva.com/security/advisories (vendor-advisory)

Frequently asked questions

What is CVE-2012-2110?: CVE-2012-2110 is a vulnerability in OpenSSL, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2012-04-19.
Is CVE-2012-2110 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.