CVE-2015-6251

NameCVE-2015-6251
DescriptionDouble free vulnerability in GnuTLS before 3.3.17 and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service via a long DistinguishedName (DN) entry in a certificate.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3334-1
NVD severitymedium (attack range: remote)
Debian Bugs795068

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gnutls26 (PTS)wheezy, wheezy (security)2.12.20-8+deb7u5fixed
gnutls28 (PTS)jessie3.3.8-6+deb8u7fixed
jessie (security)3.3.8-6+deb8u6fixed
stretch3.5.8-5+deb9u3fixed
stretch (security)3.5.8-5+deb9u1fixed
buster, sid3.5.16-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gnutls26source(unstable)(not affected)
gnutls28source(unstable)3.3.17-1medium795068
gnutls28sourcejessie3.3.8-6+deb8u2mediumDSA-3334-1

Notes

- gnutls26 <not-affected> (Vulnerable code not present)
http://www.openwall.com/lists/oss-security/2015/08/10/1
https://gitlab.com/gnutls/gnutls/commit/272854367efc130fbd4f1a51840d80c630214e12
http://www.gnutls.org/security.html#GNUTLS-SA-2015-3
_gnutls_x509_dn_to_string() introduced in 3.1.10 via:
https://gitlab.com/gnutls/gnutls/commit/6be35136333b5d6289f23209cf896e741462909a

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