USN-2673-1: Thunderbird vulnerabilities

Details

Karthikeyan Bhargavan discovered that NSS incorrectly handled state
transitions for the TLS state machine. If a remote attacker were able to
perform a machine-in-the-middle attack, this flaw could be exploited to skip
the ServerKeyExchange message and remove the forward-secrecy property.
(CVE-2015-2721)

Bob Clary, Christian Holler, Bobby Holley, and Andrew McCreight discovered
multiple memory safety issues in Thunderbird. If a user were tricked in to
opening a specially crafted website in a browsing context, an attacker
could potentially exploit these to cause a denial of service via
application crash, or execute arbitrary code with the privileges of the
user invoking Thunderbird. (CVE-2015-2724)

Ronald Crane discovered multiple security vulnerabilities. If a user were
tricked in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service
via application crash, or execute arbitrary code with the privileges of
the user invoking Thunderbird. (CVE-2015-2734, CVE-2015-2735,
CVE-2015-2736, CVE-2015-2737, CVE-2015-2738, CVE-2015-2739, CVE-2015-2740)

Matthew Green discovered a DHE key processing issue in NSS where a MITM
could force a server to downgrade TLS connections to 512-bit export-grade
cryptography. An attacker could potentially exploit this to impersonate
the server. (CVE-2015-4000)

Update instructions

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

Ubuntu 15.04

• thunderbird - 1:31.8.0+build1-0ubuntu0.15.04.1

Ubuntu 14.10

• thunderbird - 1:31.8.0+build1-0ubuntu0.14.10.1

Ubuntu 14.04

• thunderbird - 1:31.8.0+build1-0ubuntu0.14.04.1

Ubuntu 12.04

• thunderbird - 1:31.8.0+build1-0ubuntu0.12.04.1

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

References

• CVE-2015-2721
• CVE-2015-2724
• CVE-2015-2734
• CVE-2015-2735
• CVE-2015-2736
• CVE-2015-2737
• CVE-2015-2738
• CVE-2015-2739
• CVE-2015-2740
• CVE-2015-4000

Related notices

• USN-2672-1: nss, libnss3-tools, libnss3-1d, libnss3, libnss3-nssdb, libnss3-dev
• USN-2656-1: firefox-locale-ast, firefox-locale-sq, firefox-locale-de, firefox-locale-hi, firefox-locale-zh-hant, firefox-locale-as, firefox-locale-ga, firefox-locale-be, firefox-locale-da, firefox-locale-pl, firefox-locale-ko, firefox-locale-sk, firefox-locale-ru, firefox-locale-hy, firefox-locale-lv, firefox-locale-si, firefox-locale-et, firefox-locale-hu, firefox-locale-bn, firefox-locale-mk, firefox-locale-ca, firefox-locale-te, firefox-locale-gu, firefox-locale-zu, firefox-locale-ja, firefox-locale-sw, firefox-locale-th, firefox-locale-ar, firefox-locale-xh, firefox-mozsymbols, firefox-locale-gd, firefox-locale-ku, firefox-globalmenu, firefox-locale-es, firefox-locale-fi, firefox-locale-ms, firefox-locale-csb, firefox-locale-mr, firefox-locale-eu, firefox-locale-nl, firefox-locale-km, firefox-locale-or, firefox-dev, firefox-locale-eo, firefox-locale-oc, firefox-locale-sl, firefox-locale-id, firefox-locale-uz, firefox-locale-vi, firefox-locale-nso, firefox-locale-fa, firefox-locale-lg, firefox-locale-mn, firefox-locale-mai, firefox-locale-pa, firefox-locale-cs, firefox-locale-kk, firefox-locale-ka, firefox-locale-ro, firefox-locale-an, firefox-locale-bg, firefox, firefox-locale-en, firefox-locale-hr, firefox-locale-ml, firefox-locale-bs, firefox-locale-az, firefox-locale-is, firefox-locale-kn, firefox-locale-nb, firefox-locale-fy, firefox-locale-it, firefox-locale-sv, firefox-locale-af, firefox-locale-gl, firefox-locale-pt, firefox-locale-ta, firefox-locale-cy, firefox-locale-hsb, firefox-locale-br, firefox-locale-uk, firefox-locale-zh-hans, firefox-locale-he, firefox-locale-sr, firefox-locale-el, firefox-locale-lt, firefox-locale-nn, firefox-testsuite, firefox-locale-tr, firefox-locale-fr
• USN-2656-2: firefox
• 2696-1: openjdk-7-jre-lib, openjdk-7-jre-headless, openjdk-7, icedtea-7-jre-jamvm, openjdk-7-jre, openjdk-7-jdk, openjdk-7-jre-zero
• USN-2706-1: openjdk-6-jre, icedtea-6-jre-cacao, openjdk-6-jre-lib, openjdk-6-jre-zero, openjdk-6-source, openjdk-6-jdk, openjdk-6-jre-headless, openjdk-6, icedtea-6-jre-jamvm
• USN-2696-1: openjdk-7-jre-lib, openjdk-7-jre-headless, openjdk-7, icedtea-7-jre-jamvm, openjdk-7-demo, openjdk-7-jre, openjdk-7-doc, openjdk-7-source, openjdk-7-jdk, openjdk-7-jre-zero