Mozilla Plugs Thunderbird Security Hole

The open-source company is having a nightmarish security week, fixing flaws in Firefox, a Firefox extension, SeaMonkey and now its e-mail client in six-day span.

Mozilla is certainly having a nightmarish security week. Late June 4, it released a security-fix Version 1.5.0.12 of its Thunderbird e-mail client, after updating its Firefox browser, a Firefox Google toolbar extension and its SeaMonkey Web application suite—all within the last six days.

The new Thunderbird 1.5.0.12 replaces 1.5.0.10. The 1.5.0.11 version number was skipped to keep in sync with Firefox, a Mozilla spokesperson said.

The security fixes are detailed in the Thunderbird 1.5.0.12 section of the Mozilla Foundation Security Advisories page. The most important fixes include a flaw in APOP authentication (which also affects the Mail & Newsgroups component of SeaMonkey) and a memory corruption bug (which also affects Firefox and SeaMonkey), the spokesperson said.

"The release of Thunderbird 1.5.0.12 brings Thunderbird 1.5s security into line with that of Firefox 1.5.0.12, Firefox 2.0.0.4, and SeaMonkey 1.1.2 and 1.0.9, all of which were released last week," the spokesperson said.

Thunderbird 1.5 was replaced by Thunderbird 2 in April but Version 1.5 will continue to be supported with security and stability updates until Oct. 18, the spokesperson said.

Support for the equivalent Firefox 1.5, which was replaced by Firefox 2 last October, is currently being phased out.

Thunderbird 1.5.0.12 can be downloaded (10.2MB for Linux users) from the older Thunderbird releases Web page or via Thunderbirds built-in software update system. More details are available in the Thunderbird 1.5.0.12 release notes.

Check out eWEEK.coms Security Center for the latest security news, reviews and analysis. And for insights on security coverage around the Web, take a look at eWEEKs Security Watch blog.

Chris Preimesberger

Chris Preimesberger

Chris Preimesberger is Editor of Features & Analysis at eWEEK, responsible in part for the publication's coverage areas. In his 10 years and more than 3,500 stories at eWEEK, he has distinguished...