CVE-2019-9792

Published: Apr 26, 2019Modified: Nov 25, 2025

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Affected (11)

Products: Mozilla: Firefox, Thunderbird · Redhat: Enterprise Linux, Enterprise Linux Eus, Enterprise Linux Server Aus, Enterprise Linux Server Tus

2 products

4 products

Enterprise Linux

Enterprise Linux Eus

Enterprise Linux Server Aus

Enterprise Linux Server Tus

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 60.6.0
Mozilla Firefox	Before 66.0
Mozilla Thunderbird	Before 60.6.0

Configuration B

8 vulnerable

Vulnerable Software	Affected Versions
Redhat Enterprise Linux	Version 8.0
Redhat Enterprise Linux Eus	Version 8.1
Redhat Enterprise Linux Eus	Version 8.2
Redhat Enterprise Linux Eus	Version 8.4
Redhat Enterprise Linux Server Aus	Version 8.2
Redhat Enterprise Linux Server Aus	Version 8.4
Redhat Enterprise Linux Server Tus	Version 8.2
Redhat Enterprise Linux Server Tus	Version 8.4

Related CWEs

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (14)

http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.html

Source: security@mozilla.org

ExploitThird Party AdvisoryVDB Entry

https://access.redhat.com/errata/RHSA-2019:0966

Source: security@mozilla.org

Third Party Advisory

https://access.redhat.com/errata/RHSA-2019:1144

Source: security@mozilla.org

Third Party Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=1532599

Source: security@mozilla.org

ExploitIssue TrackingVendor Advisory

https://www.mozilla.org/security/advisories/mfsa2019-07/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2019-08/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2019-11/

Source: security@mozilla.org

Vendor Advisory

http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.html

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party AdvisoryVDB Entry

https://access.redhat.com/errata/RHSA-2019:0966

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://access.redhat.com/errata/RHSA-2019:1144

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=1532599

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingVendor Advisory

https://www.mozilla.org/security/advisories/mfsa2019-07/

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2019-08/

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2019-11/

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.