openSUSE Security Update : tor (openSUSE-SU-2014:0975-1)

This script is Copyright (C) 2014 Tenable Network Security, Inc.

Synopsis :

The remote openSUSE host is missing a security update.

Description :

- Tor [bnc#889688] [CVE-2014-5117] Slows down the
risk from guard rotation and backports several important
fixes from the Tor 0.2.5 alpha release series.

- Major features :

- Clients now look at the 'usecreatefast' consensus
parameter to decide whether to use CREATE_FAST or CREATE
cells for the first hop of their circuit. This approach
can improve security on connections where Tor's circuit
handshake is stronger than the available TLS connection
security levels, but the tradeoff is more computational
load on guard relays.

- Make the number of entry guards configurable via a new
NumEntryGuards consensus parameter, and the number of
directory guards configurable via a new
NumDirectoryGuards consensus parameter.

- Major bugfixes :

- Fix a bug in the bounds-checking in the 32-bit
curve25519-donna implementation that caused incorrect
results on 32-bit implementations when certain malformed
inputs were used along with a small class of private
ntor keys.

- Minor bugfixes :

- Warn and drop the circuit if we receive an inbound
'relay early' cell.

- Correct a confusing error message when trying to extend
a circuit via the control protocol but we don't know a
descriptor or microdescriptor for one of the specified

- Avoid an illegal read from stack when initializing the
TLS module using a version of OpenSSL without all of the
ciphers used by the v2 link handshake.

See also :

Solution :

Update the affected tor packages.

Risk factor :

Medium / CVSS Base Score : 5.8

Family: SuSE Local Security Checks

Nessus Plugin ID: 77136 ()

Bugtraq ID:

CVE ID: CVE-2014-5117

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