CVE-2016-6261

NameCVE-2016-6261
DescriptionThe idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via 64 bytes of input.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-582-1, DSA-3658-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libidn (PTS)wheezy1.25-2vulnerable
wheezy (security)1.25-2+deb7u3fixed
jessie (security), jessie1.29-1+deb8u2fixed
stretch1.33-1fixed
buster, sid1.33-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libidnsource(unstable)1.33-1medium
libidnsourcejessie1.29-1+deb8u2mediumDSA-3658-1
libidnsourcewheezy1.25-2+deb7u2mediumDLA-582-1

Notes

https://lists.gnu.org/archive/html/help-libidn/2016-07/msg00009.html
Test: http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=9a1a7e15d0706634971364493fbb06e77e74726c (libidn-1-33)
Fix: http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=f20ce1128fb7f4d33297eee307dddaf0f92ac72d (libidn-1-33)
Follow-up memory leak fix: http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=11abd0e02c16f9e0b6944aea4ef0f2df44b42dd4 (libidn-1-33)
http://www.openwall.com/lists/oss-security/2016/07/20/6

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