Use After Free Affecting firefox package, versions <66.0+build3-0ubuntu1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2104-FIREFOX-1262248
- published20 Mar 2019
- disclosed26 Apr 2019
Introduced: 20 Mar 2019
CVE-2019-9796 (opens in a new tab)How to fix?
Upgrade Ubuntu:21.04 firefox to version 66.0+build3-0ubuntu1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu.
See How to fix? for Ubuntu:21.04 relevant fixed versions and status.
A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh driver twice when only a single registration is expected. When a registration is later freed with the removal of the animation controller element, the refresh driver incorrectly leaves a dangling pointer to the driver's observer array. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-9796
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9796
- https://security-tracker.debian.org/tracker/CVE-2019-9796
- https://www.mozilla.org/security/advisories/mfsa2019-07/
- https://www.mozilla.org/security/advisories/mfsa2019-08/
- https://www.mozilla.org/security/advisories/mfsa2019-11/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1531277
- https://access.redhat.com/errata/RHSA-2019:0966
- https://access.redhat.com/errata/RHSA-2019:1144