CVE-2019-17011
Under certain conditions, when retrieving a document from a DocShell in the antitracking code, a race condition could cause a use-after-free condition and a potentially exploitable crash.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Under certain conditions, when retrieving a document from a DocShell in the antitracking code, a race condition could cause a use-after-free condition and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.52% probability · 74th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- mozilla/firefox · mozilla/firefox esr · mozilla/thunderbird · opensuse/leap · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS 1.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.htmlMailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0292Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0295Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1591334Exploit, Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202003-02Third Party Advisory
- https://security.gentoo.org/glsa/202003-10Third Party Advisory
- https://usn.ubuntu.com/4241-1/Third Party Advisory
- https://usn.ubuntu.com/4335-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-36/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-37/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-38/Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.htmlMailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0292Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0295Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1591334Exploit, Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202003-02Third Party Advisory
- https://security.gentoo.org/glsa/202003-10Third Party Advisory
- https://usn.ubuntu.com/4241-1/Third Party Advisory
- https://usn.ubuntu.com/4335-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-36/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-37/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-38/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.