Under certain conditions, when checking the Resist Fingerprinting preference during device orientation checks, a race condition could have caused a use-after-free and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-17010
• https://access.redhat.com/errata/RHSA-2020:0292
• https://access.redhat.com/errata/RHSA-2020:0295
• https://bugzilla.mozilla.org/show_bug.cgi?id=1581084
• https://security.gentoo.org/glsa/202003-02
• https://security.gentoo.org/glsa/202003-10
• https://usn.ubuntu.com/4241-1/
• https://usn.ubuntu.com/4335-1/
• https://www.mozilla.org/security/advisories/mfsa2019-36/
• https://www.mozilla.org/security/advisories/mfsa2019-37/
• https://www.mozilla.org/security/advisories/mfsa2019-38/
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html