CVE-2011-0014 — ssl/t1_lib

ssl/t1_lib.c in OpenSSL 0.9.8h through 0.9.8q and 1.0.0 through 1.0.0c allows remote attackers to cause a denial of service (crash), and possibly obtain sensitive information in applications that use OpenSSL, via a malformed ClientHello handshake message that triggers an out-of-b

01What is this vulnerability?

ssl/t1_lib.c in OpenSSL 0.9.8h through 0.9.8q and 1.0.0 through 1.0.0c allows remote attackers to cause a denial of service (crash), and possibly obtain sensitive information in applications that use OpenSSL, via a malformed ClientHello handshake message that triggers an out-of-bounds memory access, aka "OCSP stapling vulnerability."

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2011-02-18T23:00:00.000Z
• Last modified: 2024-08-06T21:36:02.316Z

09References

• www.vupen.com — http://www.vupen.com/english/advisories/2011/0361
• slackware.com — http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware…
• www-01.ibm.com — http://www-01.ibm.com/support/docview.wss?uid=ssg1S1004564
• osvdb.org — http://osvdb.org/70847
• support.apple.com — http://support.apple.com/kb/HT4723
• www.vupen.com — http://www.vupen.com/english/advisories/2011/0399
• www.redhat.com — http://www.redhat.com/support/errata/RHSA-2011-0677.html
• secunia.com — http://secunia.com/advisories/43301
• oval.cisecurity.org — https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3…
• lists.apple.com — http://lists.apple.com/archives/security-announce/2011//Jun/msg00000.html
• www.vupen.com — http://www.vupen.com/english/advisories/2011/0387
• secunia.com — http://secunia.com/advisories/43286
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
• www.debian.org — http://www.debian.org/security/2011/dsa-2162
• www.vupen.com — http://www.vupen.com/english/advisories/2011/0395
• ftp.netbsd.org — http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2011-002.txt.asc
• www.ubuntu.com — http://www.ubuntu.com/usn/USN-1064-1
• marc.info — http://marc.info/?l=bugtraq&m=130497251507577&w=2
• h20000.www2.hp.com — http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777
• h20000.www2.hp.com — http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02794777
• secunia.com — http://secunia.com/advisories/43227
• www.vupen.com — http://www.vupen.com/english/advisories/2011/0389
• www.mandriva.com — http://www.mandriva.com/security/advisories?name=MDVSA-2011:028
• lists.fedoraproject.org — http://lists.fedoraproject.org/pipermail/package-announce/2011-February/054007.h…
• www.securityfocus.com — http://www.securityfocus.com/bid/46264
• secunia.com — http://secunia.com/advisories/57353
• marc.info — http://marc.info/?l=bugtraq&m=131042179515633&w=2
• www.openssl.org — http://www.openssl.org/news/secadv_20110208.txt
• secunia.com — http://secunia.com/advisories/44269
• marc.info — http://marc.info/?l=bugtraq&m=130497251507577&w=2