#VU32707 Buffer overflow in GnuTLS - CVE-2011-4128

Vulnerability identifier: #VU32707

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-4128

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GnuTLS
Universal components / Libraries / Libraries used by multiple products

Vendor: GnuTLS

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GnuTLS: 2.12.0 - 2.12.13

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.