Closed Bug 763990 Opened 9 years ago Closed 9 years ago

Branch 13 bundles vulnerable libpng

Categories

(Core :: ImageLib, defect)

13 Branch
x86
Linux
defect
Not set
critical

Tracking

()

RESOLVED WORKSFORME
Tracking Status
firefox15 --- fixed
firefox16 --- fixed
firefox-esr10 --- unaffected

People

(Reporter: andy44, Unassigned)

Details

Libpng 1.5.9, bundled in branch 13.0, is vulnerable to CVE-2011-3048 (see: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3048 & http://www.libpng.org/pub/png/src/libpng-1.5.10-README.txt).

The bundled version should be updated to version 1.5.10 across the board (firefox, thunderbird, etc.).
libpng was updated to 1.5.10 on April 25 for Mozilla Central. This means it is fixed in Firefox 15 and 16 now.

See bug 745178 and https://hg.mozilla.org/mozilla-central/rev/f22a06ee6a6e

Adding flags for affected versions (Firefox 14 and ESR).
Status: UNCONFIRMED → NEW
Ever confirmed: true
Andrew, do you know of a testcase to check to see if we're vulnerable? We're not always susceptible to some of the png issues.
see bug 745178 comment from one of the libpng maintainers -- that CVE does not affect Firefox because it's in a feature we don't use.
Group: core-security
Status: NEW → RESOLVED
Closed: 9 years ago
Resolution: --- → WORKSFORME
repeating bug 745178 comment 0 for the convenience of linkability

"The main reason for the release was to fix CVE-2011-3048, but we aren't vulnerable to that."
I didn't drill down to see if png_set_text2 (where the problem lies) is used by Mozilla either directly or indirectly. Figured I'd report it just in case.

Good to know it isn't used - makes for an easy fix.
Not only is it not used, it is totally ignored via the png_set_keep_unknown_chunks() call in the PNG decoder.  Therefore even mozilla builds that use the "system" libpng instead of the bundled libpng are safe.
You need to log in before you can comment on or make changes to this bug.