In this roundup of fixes, its all browsers this month. Google released Chrome 21, patching a number of dangerous PDF-viewer-related bugs. Mozilla tackled more vulnerabilities than usual, including an interesting drag-and-drop bug, and Apple released Safari 6.0, sealing multiple potential private information leaks.
Google Chrome Turns 21
Google released a number of security updates for the Google Chrome Stable Channel. These updates affect OS X and Linux (updated to Chrome 21.0.1180.57), as well as Windows and Chrome Frame (Chrome 21.0.1180.60).
Chrome 21 includes patches that address 15 security vulnerabilities. One vulnerability was rated critical; of the others, six were rated high, five medium, and three low. Five of the weaknesses affected Chromes built-in PDF viewer and could have caused memory corruption, a program crash, or other unexpected behavior. Google also patched a vulnerability that could give an attacker unusually broad file access via Chromes implementation of drag and drop, among other vulnerabilities, as well as several nonsecurity-related bugs.
for more on the Chrome 21 fixes.
Mozilla Posts Repairs
Mozilla released patches for 15 security advisories (the most in nearly two years), for Firefox, Thunderbird, and SeaMonkey. Five bugs are rated critical, four high, and six moderate.
Security researchers found a vulnerability that could enable a remote attacker to short-circuit a page load in Firefox via the drag-and-drop mechanism. Normally, when you drag and
drop a URL into the address bar, that URL loads automatically. But the short-circuit, which is triggered by dragging and dropping a malicious address, lets hackers spoof the address bar and opens your system to phishing attacks.
Mozilla also identified and fixed several memory corruption bugsrated highin the browser engine used in Mozilla-based products that could potentially be exploited to run arbitrary code on your system. Another memory corruption bug could cause your program to crash.
These vulnerabilities and others are corrected in Firefox 13, 14, and ESR 10.0.6; Thunderbird 13, 14, and ESR 10.0.6; and SeaMonkey 2.11.
For more on the fixes, see Mozilla's Security Advisory
, and specifically MFSA 2012-43
, MFSA 2012-42
, and MFSA 2012-52