Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2015.0860
tor security update
7 April 2015
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: tor
Publisher: Debian
Operating System: Debian GNU/Linux 7
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-2929 CVE-2015-2928
Original Bulletin:
http://www.debian.org/security/2015/dsa-3216
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running tor check for an updated version of the software for their
operating system.
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Debian Security Advisory DSA-3216-1 security@debian.org
http://www.debian.org/security/ Moritz Muehlenhoff
April 06, 2015 http://www.debian.org/security/faq
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Package : tor
CVE ID : CVE-2015-2928 CVE-2015-2929
Several vulnerabilities have been discovered in Tor, a connection-based
low-latency anonymous communication system:
CVE-2015-2928
"disgleirio" discovered that a malicious client could trigger an
assertion failure in a Tor instance providing a hidden service,
thus rendering the service inaccessible.
CVE-2015-2929
"DonnchaC" discovered that Tor clients would crash with an
assertion failure upon parsing specially crafted hidden service
descriptors.
Introduction points would accept multiple INTRODUCE1 cells on one
circuit, making it inexpensive for an attacker to overload a hidden
service with introductions. Introduction points now no longer allow
multiple cells of that type on the same circuit.
For the stable distribution (wheezy), these problems have been fixed in
version 0.2.4.27-1.
For the unstable distribution (sid), these problems have been fixed in
version 0.2.5.12-1.
For the experimental distribution, these problems have been
fixed in version 0.2.6.7-1.
We recommend that you upgrade your tor packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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