CVE-2016-10396

NameCVE-2016-10396
DescriptionThe racoon daemon in IPsec-Tools 0.8.2 contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1044-1
NVD severityhigh (attack range: remote)
Debian Bugs867986

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ipsec-tools (PTS)wheezy1:0.8.0-14+deb7u1vulnerable
wheezy (security)1:0.8.0-14+deb7u3fixed
jessie (security), jessie1:0.8.2+20140711-2+deb8u1vulnerable
stretch1:0.8.2+20140711-8vulnerable
buster, sid1:0.8.2+20140711-10fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ipsec-toolssource(unstable)1:0.8.2+20140711-9high867986
ipsec-toolssourcewheezy1:0.8.0-14+deb7u2highDLA-1044-1

Notes

[stretch] - ipsec-tools <no-dsa> (Will be fixed via point release)
[jessie] - ipsec-tools <no-dsa> (Will be fixed via point release)
NetBSD applied patch: http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/isakmp_frag.c.diff?r1=1.5&r2=1.5.36.1
NetBSD Problem report: https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682
Patch disputed, cf. https://bugzilla.novell.com/show_bug.cgi?id=1047443#c1
Updated patch: https://anonscm.debian.org/cgit/pkg-ipsec-tools/pkg-ipsec-tools.git/plain/debian/patches/CVE-2016-10396.patch?id=62ac12648a4eb7c5ba5dba0f81998d1acf310d8b

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