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Bug 592068 (CVE-2016-2181) - <dev-libs/openssl-1.0.2i: DTLS replay protection bypass via sending large sequence number
Summary: <dev-libs/openssl-1.0.2i: DTLS replay protection bypass via sending large seq...
Alias: CVE-2016-2181
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
Whiteboard: A3 [glsa cve]
Depends on: CVE-2016-2180, CVE-2016-2183, CVE-2016-6303, CVE-2016-6304, CVE-2016-6305, CVE-2016-6306, CVE-2016-6307, CVE-2016-6308
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Reported: 2016-08-25 08:48 UTC by Agostino Sarubbo
Modified: 2016-12-07 10:27 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2016-08-25 08:48:55 UTC
From ${URL} :

It was found that when doing handshake/renegotiation, it's possible to bypass DTLS replay protection by 
sending a record for the next epoch (which does not have to decrypt or have a valid MAC), with a very 
large sequence number. This means the right hand edge of the window is moved very far to the right, and 
all subsequent legitimate packets are dropped causing a denial of service.

Upstream patches:

@maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.
Comment 1 Yury German Gentoo Infrastructure gentoo-dev 2016-09-23 01:42:08 UTC
Added to an existing GLSA Request.
Comment 2 GLSAMaker/CVETool Bot gentoo-dev 2016-12-07 10:27:49 UTC
This issue was resolved and addressed in
 GLSA 201612-16 at
by GLSA coordinator Aaron Bauman (b-man).