CVE-2019-9792

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/26/2019

Last Modified11/25/2025

Sourcenvd

Honeypot Sightings0

Affected Products

mozilla:firefoxmozilla:thunderbirdredhat:enterprise_linuxredhat:enterprise_linux_eusredhat:enterprise_linux_server_ausredhat:enterprise_linux_server_tus

Weaknesses (CWE)

CWE-787

References

http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.html(security@mozilla.org)

https://access.redhat.com/errata/RHSA-2019:0966(security@mozilla.org)

https://access.redhat.com/errata/RHSA-2019:1144(security@mozilla.org)

https://bugzilla.mozilla.org/show_bug.cgi?id=1532599(security@mozilla.org)

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

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

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

http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.html(af854a3a-2127-422b-91ae-364da2661108)

https://access.redhat.com/errata/RHSA-2019:0966(af854a3a-2127-422b-91ae-364da2661108)

https://access.redhat.com/errata/RHSA-2019:1144(af854a3a-2127-422b-91ae-364da2661108)

https://bugzilla.mozilla.org/show_bug.cgi?id=1532599(af854a3a-2127-422b-91ae-364da2661108)

https://www.mozilla.org/security/advisories/mfsa2019-07/(af854a3a-2127-422b-91ae-364da2661108)

https://www.mozilla.org/security/advisories/mfsa2019-08/(af854a3a-2127-422b-91ae-364da2661108)

https://www.mozilla.org/security/advisories/mfsa2019-11/(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.