CVE-2011-4128

CVE-2011-4128 is a medium-severity vulnerability in Gnu Gnutls with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.3)
• EPSS exploit prediction: 2% (82nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Gnu Gnutls
• Published: 2011-12-08
• Last modified: 2026-06-16

Description

Buffer overflow in the gnutls_session_get_data function in lib/gnutls_session.c in GnuTLS 2.12.x before 2.12.14 and 3.x before 3.0.7, when used on a client that performs nonstandard session resumption, allows remote TLS servers to cause a denial of service (application crash) via a large SessionTicket.

Frequently asked questions

What is CVE-2011-4128?

Buffer overflow in the gnutls_session_get_data function in lib/gnutls_session.c in GnuTLS 2.12.x before 2.12.14 and 3.x before 3.0.7, when used on a client that performs nonstandard session resumption, allows remote TLS servers to cause a denial of service (application crash) via a large SessionTicket.

How severe is CVE-2011-4128?

CVE-2011-4128 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-4128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4128?

CVE-2011-4128 primarily affects Gnu Gnutls. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4128?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-4128 published?

CVE-2011-4128 was published on 2011-12-08 and last updated on 2026-06-16.

References

• http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5596
• http://git.savannah.gnu.org/gitweb/?p=gnutls.git%3Ba=commitdiff%3Bh=190cef6eed37d0e73a73c1e205eb31d45ab60a3c
• http://git.savannah.gnu.org/gitweb/?p=gnutls.git%3Ba=commitdiff%3Bh=e82ef4545e9e98cbcb032f55d7c750b81e3a0450
• http://lists.fedoraproject.org/pipermail/package-announce/2012-April/077071.html
• http://openwall.com/lists/oss-security/2011/11/09/2
• http://openwall.com/lists/oss-security/2011/11/09/4
• http://rhn.redhat.com/errata/RHSA-2012-0429.html
• http://rhn.redhat.com/errata/RHSA-2012-0488.html
• http://rhn.redhat.com/errata/RHSA-2012-0531.html
• http://secunia.com/advisories/48596
• http://secunia.com/advisories/48712
• http://www.gnu.org/software/gnutls/security.html
• http://www.mandriva.com/security/advisories?name=MDVSA-2012:045
• http://www.ubuntu.com/usn/USN-1418-1
• https://bugzilla.redhat.com/show_bug.cgi?id=752308

Affected products (22)

• cpe:2.3:a:gnu:gnutls:2.12.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.3:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.4:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.5:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.6:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.7:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.8:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.9:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.10:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.11:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.12:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:2.12.13:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:gnutls:3.0.6:*:*:*:*:*:*:*

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