Nome do pacote
tor
Data
2013-04-10
ID Alerta
MDVSA-2013:132
Versões afetadas
MBS1 x86_64

Descrição do problema

Updated tor package fixes security vulnerabilities:

Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS
certificate chain as part of an outgoing OR connection, which allows
remote relays to bypass intended anonymity properties by reading this
chain and then determining the set of entry guards that the client
or bridge had selected (CVE-2011-2768).

Tor before 0.2.2.34, when configured as a bridge, accepts the CREATE
and CREATE_FAST values in the Command field of a cell within an OR
connection that it initiated, which allows remote relays to enumerate
bridges by using these values (CVE-2011-2769).

Use-after-free vulnerability in dns.c in Tor before 0.2.2.38 might
allow remote attackers to cause a denial of service (daemon crash)
via vectors related to failed DNS requests (CVE-2012-3517).

The networkstatus_parse_vote_from_string function in routerparse.c
in Tor before 0.2.2.38 does not properly handle an invalid flavor
name, which allows remote attackers to cause a denial of service
(out-of-bounds read and daemon crash) via a crafted (1) vote document
or (2) consensus document (CVE-2012-3518).

routerlist.c in Tor before 0.2.2.38 uses a different amount of time
for relay-list iteration depending on which relay is chosen, which
might allow remote attackers to obtain sensitive information about
relay selection via a timing side-channel attack (CVE-2012-3519).

The compare_tor_addr_to_addr_policy function in or/policies.c in
Tor before 0.2.2.39, and 0.2.3.x before 0.2.3.21-rc, allows remote
attackers to cause a denial of service (assertion failure and daemon
exit) via a zero-valued port field that is not properly handled during
policy comparison (CVE-2012-4419).

Tor before 0.2.2.39, when waiting for a client to renegotiate, allowed
it to add bytes to the input buffer, allowing a crash to be caused
remotely (tor-5934, tor-6007).

Denial of Service vulnerability in Tor before 0.2.3.25, due to an
error when handling SENDME cells and can be exploited to cause
excessive consumption of memory resources within an entry node
(SA51329, CVE-2012-5573).

The version of Tor shipped in MBS1 did not have correctly formed
systemd unit and thus failed to start.

This updated version corrects this problem and restores working
behaviour.

Pacotes atualizados

MBS1 x86_64

 8cadc920e4452cd2a3551a3cb01d9fcf  mbs1/x86_64/tor-0.2.2.39-1.mbs1.x86_64.rpm 
 7cbba7170bc4f9e6ee8409398437570c  mbs1/SRPMS/tor-0.2.2.39-1.mbs1.src.rpm

Referências