#VU32712 Cryptographic issues in GnuTLS - CVE-2013-1619
Vulnerability identifier: #VU32712
Vulnerability risk: Medium
CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-310
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 read and manipulate data.
The TLS implementation in GnuTLS before 2.12.23, 3.0.x before 3.0.28, and 3.1.x before 3.1.7 does not properly consider timing side-channel attacks on a noncompliant MAC check operation during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, a related issue to CVE-2013-0169.
Mitigation
Install update from vendor's website.
Vulnerable software versions
GnuTLS: 2.12.0 - 3.1.6
External links
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00003.html
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00009.html
https://lists.opensuse.org/opensuse-updates/2013-05/msg00023.html
https://nmav.gnutls.org/2013/02/time-is-money-for-cbc-ciphersuites.html
https://openwall.com/lists/oss-security/2013/02/05/24
https://rhn.redhat.com/errata/RHSA-2013-0588.html
https://secunia.com/advisories/57260
https://secunia.com/advisories/57274
https://www.gnutls.org/security.html#GNUTLS-SA-2013-1
https://www.isg.rhul.ac.uk/tls/TLStiming.pdf
https://www.ubuntu.com/usn/USN-1752-1
https://gitorious.org/gnutls/gnutls/commit/328ee22c1b3951e060c7124c7cb1cee592c59bc0
https://gitorious.org/gnutls/gnutls/commit/b8391806cd79095fe566f2401d8c7ad85a64b198
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.
