Bug 1470232 - (CVE-2016-10396) CVE-2016-10396 ipsec-tools: Parsing and storing ISAKMP fragments in malicious order can exhaust resources
CVE-2016-10396 ipsec-tools: Parsing and storing ISAKMP fragments in malicious...
Status: CLOSED WONTFIX
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20161202,repor...
: Security
Depends On: 1470233 1470234
Blocks:
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Reported: 2017-07-12 10:39 EDT by Andrej Nemec
Modified: 2017-07-12 10:43 EDT (History)
3 users (show)

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Last Closed: 2017-07-12 10:43:15 EDT
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Description Andrej Nemec 2017-07-12 10:39:29 EDT
The 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.

References:

https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=51682

Upstream 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
Comment 1 Andrej Nemec 2017-07-12 10:39:51 EDT
Created ipsec-tools tracking bugs for this issue:

Affects: epel-all [bug 1470233]
Affects: fedora-all [bug 1470234]

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