CVE-2019-9821
published 2019-07-23CVE-2019-9821: A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash…
PriorityP337high8.1CVSS 3.0
AVNACHPRNUINSUCHIHAH
EPSS
0.85%
53.7th percentile
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 67.0-2 (sid) | firefox 67.0-2 (sid) |
| mozilla | firefox | < 67.0 | 67.0 |
| mozilla | firefox | >= 0 < 67.0+build2-0ubuntu0.16.04.1 | 67.0+build2-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 67.0.2+build2-0ubuntu0.16.04.1 | 67.0.2+build2-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 67.0.1+build1-0ubuntu0.16.04.1 | 67.0.1+build1-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 67.0+build2-0ubuntu0.18.04.1 | 67.0+build2-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 67.0.2+build2-0ubuntu0.18.04.1 | 67.0.2+build2-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 67.0.1+build1-0ubuntu0.18.04.1 | 67.0.1+build1-0ubuntu0.18.04.1 |
| mozilla | firefox | >= unspecified < 67 | 67 |
CVSS provenance
nvdv3.08.1HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_ubuntu9.8CRITICAL
vendor_debian8.1HIGH
vendor_redhat8.1HIGH
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Ubuntu
Firefox regression
vendor_ubuntu·2019-06-14·CVSS 9.8
[CRITICAL] Firefox regression
Title: Firefox regression
Summary: USN-3991-2 caused a regression in Firefox
USN-3991-1 fixed vulnerabilities in Firefox, and USN-3991-2 fixed a
subsequent regression. The update caused an additional regression that
resulted in Firefox failing to load correctly after executing it in safe
mode. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, spoof the browser
UI, trick the user in to launching local executable binaries, obtain
sensitive information, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11691, CVE-2019-11692,
Ubuntu
Firefox regression
vendor_ubuntu·2019-06-06·CVSS 9.8
[CRITICAL] Firefox regression
Title: Firefox regression
Summary: USN-3991-1 caused a regression in Firefox.
USN-3991-1 fixed vulnerabilities in Firefox. The update caused a
regression which resulted in issues when upgrading between Ubuntu
releases. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, spoof the browser
UI, trick the user in to launching local executable binaries, obtain
sensitive information, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11691, CVE-2019-11692, CVE-2019-11693,
CVE-2019-11695, CVE-2019-11696, CVE-2019-11699, CVE-2019-11
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2019-05-21·CVSS 9.8
CVE-2019-11691 [CRITICAL] Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, spoof the browser
UI, trick the user in to launching local executable binaries, obtain
sensitive information, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11691, CVE-2019-11692, CVE-2019-11693,
CVE-2019-11695, CVE-2019-11696, CVE-2019-11699, CVE-2019-11701,
CVE-2019-7317, CVE-2019-9800, CVE-2019-9814, CVE-2019-9817, CVE-2019-9819,
CVE-2019-9820, CVE-2019-9821)
It was discovered that pressing certain key combinations could bypass
Red Hat
firefox: use-after-free in AssertWorkerThread leading to crash
vendor_redhat·2019-05-21·CVSS 8.1
CVE-2019-9821 [HIGH] CWE-416 firefox: use-after-free in AssertWorkerThread leading to crash
firefox: use-after-free in AssertWorkerThread leading to crash
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.
Package: firefox (Red Hat Enterprise Linux 5) - Not affected
Package: firefox (Red Hat Enterprise Linux 6) - Not affected
Package: firefox (Red Hat Enterprise Linux 7) - Not affected
Package: firefox (Red Hat Enterprise Linux 8) - Not affected
Debian
CVE-2019-9821: firefox - A use-after-free vulnerability can occur in AssertWorkerThread due to a race con...
vendor_debian·2019·CVSS 8.1
CVE-2019-9821 [HIGH] CVE-2019-9821: firefox - A use-after-free vulnerability can occur in AssertWorkerThread due to a race con...
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.
Scope: local
sid: resolved (fixed in 67.0-2)
GHSA
GHSA-f9x2-983g-532w: A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers
ghsa_unreviewed·2022-05-24
CVE-2019-9821 [HIGH] CWE-416 GHSA-f9x2-983g-532w: A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.
OSV
firefox regression
osv·2019-06-14·CVSS 9.8
[CRITICAL] firefox regression
firefox regression
USN-3991-1 fixed vulnerabilities in Firefox, and USN-3991-2 fixed a
subsequent regression. The update caused an additional regression that
resulted in Firefox failing to load correctly after executing it in safe
mode. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, spoof the browser
UI, trick the user in to launching local executable binaries, obtain
sensitive information, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11691, CVE-2019-11692, CVE-2019-11693,
CVE-2019-11695, CVE-2019-11696, CVE-2019-1
OSV
firefox regression
osv·2019-06-06·CVSS 9.8
[CRITICAL] firefox regression
firefox regression
USN-3991-1 fixed vulnerabilities in Firefox. The update caused a
regression which resulted in issues when upgrading between Ubuntu
releases. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, spoof the browser
UI, trick the user in to launching local executable binaries, obtain
sensitive information, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11691, CVE-2019-11692, CVE-2019-11693,
CVE-2019-11695, CVE-2019-11696, CVE-2019-11699, CVE-2019-11701,
CVE-2019-7317, CVE-2019-9800, CVE-2019-9814, CVE-2019-9
OSV
firefox vulnerabilities
osv·2019-05-21·CVSS 9.8
CVE-2019-11691 [CRITICAL] firefox vulnerabilities
firefox vulnerabilities
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, spoof the browser
UI, trick the user in to launching local executable binaries, obtain
sensitive information, conduct cross-site scripting (XSS) attacks, or
execute arbitrary code. (CVE-2019-11691, CVE-2019-11692, CVE-2019-11693,
CVE-2019-11695, CVE-2019-11696, CVE-2019-11699, CVE-2019-11701,
CVE-2019-7317, CVE-2019-9800, CVE-2019-9814, CVE-2019-9817, CVE-2019-9819,
CVE-2019-9820, CVE-2019-9821)
It was discovered that pressing certain key combinations could bypass
addon installation prompt delays. If a user opened a specially crafted
website, an attacker could potentially ex
OSV
CVE-2019-9821: A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers
osv·2019-05-21·CVSS 8.1
CVE-2019-9821 [HIGH] CVE-2019-9821: A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash [fedora-all]
bugzilla·2019-05-22·CVSS 8.1
CVE-2019-9821 [HIGH] CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash [fedora-all]
CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple suppor
Bugzilla
CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash
bugzilla·2019-05-22·CVSS 8.1
CVE-2019-9821 [HIGH] CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash
CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash.
Discussion:
Created firefox tracking bugs for this issue:
Affects: fedora-all [bug 1712750]
---
External References:
https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/#CVE-2019-9821
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Does not seem to affect the version of firefox shipped in Red Hat Enterprise Linux 6, 7 and 8 i.e. firefox 60.7 ESR.
2019-07-23
Published