VulnerabilityModified
CVE-2019-11757
This resulted in a use-after-free and a potentially exploitable crash.
HIGH 8.8EPSS 1.34%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.34% probability · 70th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- mozilla/firefox · mozilla/firefox esr · mozilla/thunderbird · canonical/ubuntu linux
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1577107Issue Tracking, Permissions Required
- https://security.gentoo.org/glsa/202003-10Third Party Advisory
- https://usn.ubuntu.com/4335-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-33/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-34/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-35/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1577107Issue Tracking, Permissions Required
- https://security.gentoo.org/glsa/202003-10Third Party Advisory
- https://usn.ubuntu.com/4335-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-33/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-34/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-35/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.