USN-2973-1: Thunderbird vulnerabilities

Releases

• Ubuntu 16.04 ESM
• Ubuntu 15.10
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• thunderbird - Mozilla Open Source mail and newsgroup client

Details

Christian Holler, Tyson Smith, and Phil Ringalda discovered multiple
memory safety issues in Thunderbird. If a user were tricked in to opening
a specially crafted message, an attacker could potentially exploit these
to cause a denial of service via application crash, or execute arbitrary
code. (CVE-2016-2805, CVE-2016-2807)

Hanno Böck discovered that calculations with mp_div and mp_exptmod in NSS
produce incorrect results in some circumstances, resulting in
cryptographic weaknesses. (CVE-2016-1938)

A use-after-free was discovered in ssl3_HandleECDHServerKeyExchange in
NSS. A remote attacker could potentially exploit this to cause a denial of
service via application crash, or execute arbitrary code. (CVE-2016-1978)

A use-after-free was discovered in PK11_ImportDERPrivateKeyInfoAndReturnKey
in NSS. A remote attacker could potentially exploit this to cause a denial
of service via application crash, or execute arbitrary code.
(CVE-2016-1979)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04

• thunderbird - 1:38.8.0+build1-0ubuntu0.16.04.1

Ubuntu 15.10

• thunderbird - 1:38.8.0+build1-0ubuntu0.15.10.1

Ubuntu 14.04

• thunderbird - 1:38.8.0+build1-0ubuntu0.14.04.1

Ubuntu 12.04

• thunderbird - 1:38.8.0+build1-0ubuntu0.12.04.1

After a standard system update you need to restart Thunderbird to make
all the necessary changes.

References

• CVE-2016-1938
• CVE-2016-1978
• CVE-2016-1979
• CVE-2016-2805
• CVE-2016-2807

Related notices

• USN-2880-1
• USN-2903-1
• USN-2936-1