icedove - several vulnerabilities

Several remote vulnerabilities have been discovered in the Icedove mail client,
an unbranded version of the Thunderbird client. The Common Vulnerabilities and
Exposures project identifies the following problems:

• CVE-2007-1558
  Gatan Leurent discovered a cryptographical weakness in APOP
  authentication, which reduces the required efforts for an MITM attack
  to intercept a password. The update enforces stricter validation, which
  prevents this attack.
• CVE-2007-2867
  Boris Zbarsky, Eli Friedman, Georgi Guninski, Jesse Ruderman, Martijn
  Wargers and Olli Pettay discovered crashes in the layout engine, which
  might allow the execution of arbitrary code.
• CVE-2007-2868
  Brendan Eich, Igor Bukanov, Jesse Ruderman, moz_bug_r_a4 and Wladimir Palant
  discovered crashes in the Javascript engine, which might allow the execution of
  arbitrary code. Generally, enabling Javascript in Icedove is not recommended.

Fixes for the oldstable distribution (sarge) are not available. While there
will be another round of security updates for Mozilla products, Debian doesn’t
have the resources to backport further security fixes to the old Mozilla
products. You’re strongly encouraged to upgrade to stable as soon as possible.

For the stable distribution (etch) these problems have been fixed in version
1.5.0.12.dfsg1-0etch1.

The unstable distribution (sid) will be fixed soon.

We recommend that you upgrade your icedove packages.