[SECURITY] [DSA 2548-1] tor security update

Debian Security Advisory DSA-2548-1 [email protected]
http://www.debian.org/security/ Moritz Muehlenhoff
September 13, 2012 http://www.debian.org/security/faq

Package : tor
Vulnerability : several
Problem type : remote
Debian-specific: no
CVE ID : CVE-2012-3518 CVE-2012-3519 CVE-2012-4419

Severel vulnerabilities have been discovered in Tor, an online privacy
tool.

CVE-2012-3518

Avoid an uninitialised memory read when reading a vote or consensus
document that has an unrecognized flavour name. This could lead to
a remote, resulting in denial of service.

CVE-2012-3519

Try to leak less information about what relays a client is choosing to
a side-channel attacker.

CVE-2012-4419

By providing specially crafted date strings to a victim tor instance,
an attacker can cause it to run into an assertion and shut down

Additionally the update to stable includes the following fixes:

• • When waiting for a client to renegotiate, don't allow it to add any
    bytes to the input buffer. This fixes a potential DoS issue
    [tor-5934, tor-6007].

For the stable distribution (squeeze), these problems have been fixed in
version 0.2.2.39-1.

For the unstable distribution, these problems have been fixed in version
0.2.3.22-rc-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: http://www.debian.org/security/

Mailing list: [email protected]