Closed Bug 617247 (CVE-2011-2373) Opened 13 years ago Closed 13 years ago
Use after free (in ns
XULProtype Script?) when viewing xul document w/JS disabled
204 bytes, application/vnd.mozilla.xul+xml
3.57 KB, text/plain
6.66 KB, text/plain
35.13 KB, text/plain
2.21 KB, text/html
33.48 KB, text/plain
1.13 KB, patch
|Details | Diff | Splinter Review|
So you've seen this problem with add-ons OTHER than NoScript (less reliably), and never without addons or in safe-mode?
Sicking: jst says you're the best person to take an initial look at this
Assignee: nobody → jonas
blocking2.0: --- → betaN+
Product: Firefox → Core
QA Contact: firefox → toolkit
Not blocking 2.0 on this as remote xul is disabled which lowers the severity of this bug on trunk.
Whiteboard: [sg:critical?] → [sg:critical?][sg:needinfo]
Status: UNCONFIRMED → NEW
Component: Security → XUL
Ever confirmed: true
QA Contact: toolkit → xptoolkit.widgets
Lowering to [sg:moderate] -- something's wrong here, but it's hard to call it exploitable at this point.
Whiteboard: [sg:critical?][sg:needinfo] → [sg:moderate][sg:needinfo]
Clearing sg: markings for re-triage in light of recent comments
Summary: Use after free when viewing xul document with certain add-ons. → Use after free (in nsXULProtypeScript?) when viewing xul document w/JS disabled
... might still be "moderate" if it only happens with JS disabled, which in practice is rare (but less rare amongst security-aware users).
back to sg:critical for now, "worst case". Won't know for sure until we find the true cause. We might still bump it down if JS is required in all cases, rather than just something that helps us find it in this particular testcase.
UnlinkJSObjects only calls DropScriptObjects if mScriptObject.mObject is non-null, so we shouldn't call HoldScriptObjects if we're setting mScriptObject.mObject to null since we'll never call DropScriptObjects and we'll end up accessing freed objects.
Attachment #517259 - Flags: review?(jonas)
This relies on remote XUL and on JS being disabled (either through prefs or an addon) because in that case the compilation will return a success code with a null script object. I don't think you can trigger it in any other way.
Attachment #517259 - Flags: review?(jonas) → review+
peterv: worth fixing on m-c? we don't have -remote- XUL, but might this affect our own internal (or add-on) XUL? Not a security bug in those cases, just bugs.
Whiteboard: [sg:critical?] → [sg:critical?] (if JS disabled)
Status: NEW → RESOLVED
Closed: 13 years ago
Resolution: --- → FIXED
Comment on attachment 517259 [details] [diff] [review] v1 Approved for 220.127.116.11, a=dveditz for release-drivers
blocking1.9.2: needed → .18+
Whiteboard: [sg:critical?] (if JS disabled) → [sg:critical?] (if JS disabled) needs 1.9.2 landing
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