#VU41959 Permissions, Privileges, and Access Controls in GnuTLS - CVE-2009-5138
Vulnerability identifier: #VU41959
Vulnerability risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/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-264
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.
GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, treats version 1 X.509 certificates as intermediate CAs, which allows remote attackers to bypass intended restrictions by leveraging a X.509 V1 certificate from a trusted CA to issue new certificates, a different vulnerability than CVE-2014-1959.
Mitigation
Install update from vendor's website.
Vulnerable software versions
GnuTLS: 2.7.0 - 2.7.4
External links
https://article.gmane.org/gmane.comp.security.oss.general/12223
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00000.html
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/msg00020.html
https://rhn.redhat.com/errata/RHSA-2014-0247.html
https://secunia.com/advisories/57254
https://secunia.com/advisories/57260
https://secunia.com/advisories/57274
https://secunia.com/advisories/57321
https://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3351/focus=3361
https://thread.gmane.org/gmane.comp.security.oss.general/12127
https://bugzilla.redhat.com/show_bug.cgi?id=1069301
https://gitorious.org/gnutls/gnutls/commit/c8dcbedd1fdc312f5b1a70fcfbc1afe235d800cd
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.
