CVE-2023-6863 - Mozilla: Undefined behavior in <code>ShutdownObserver()</code>

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HIGH

Mozilla: Undefined behavior in <code>ShutdownObserver()</code>

Published Dec 19, 2023

8.8

HIGH

CVSS 3.1

EPSS 1.04%

Description

The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

Affected products

Vendor Mozilla Product Firefox Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <121
Vendor Mozilla Product Firefox ESR Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <115.6
Vendor Mozilla Product Thunderbird Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <115.6

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Mozilla

Firefox

n/a

Version	Status	Constraints
unspecified	affected	<121

Mozilla

Firefox ESR

n/a

Version	Status	Constraints
unspecified	affected	<115.6

Mozilla

Thunderbird

n/a

Version	Status	Constraints
unspecified	affected	<115.6

Red Hat Enterprise Linux 7

firefox-0:115.6.0-1.el7_9

Fixed · RHSA-2024:0026
Red Hat Enterprise Linux 7

thunderbird-0:115.6.0-1.el7_9

Fixed · RHSA-2024:0027
Red Hat Enterprise Linux 8

firefox-0:115.6.0-1.el8_9

Fixed · RHSA-2024:0012
Red Hat Enterprise Linux 8

thunderbird-0:115.6.0-1.el8_9

Fixed · RHSA-2024:0003
Red Hat Enterprise Linux 8.2 Advanced Update Support

firefox-0:115.6.0-1.el8_2

Fixed · RHSA-2024:0023
Red Hat Enterprise Linux 8.2 Advanced Update Support

thunderbird-0:115.6.0-1.el8_2

Fixed · RHSA-2024:0030
Red Hat Enterprise Linux 8.2 Telecommunications Update Service

firefox-0:115.6.0-1.el8_2

Fixed · RHSA-2024:0023
Red Hat Enterprise Linux 8.2 Telecommunications Update Service

thunderbird-0:115.6.0-1.el8_2

Fixed · RHSA-2024:0030
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions

firefox-0:115.6.0-1.el8_2

Fixed · RHSA-2024:0023
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions

thunderbird-0:115.6.0-1.el8_2

Fixed · RHSA-2024:0030
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

firefox-0:115.6.0-1.el8_4

Fixed · RHSA-2024:0021
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

thunderbird-0:115.6.0-1.el8_4

Fixed · RHSA-2024:0028
Red Hat Enterprise Linux 8.4 Telecommunications Update Service

firefox-0:115.6.0-1.el8_4

Fixed · RHSA-2024:0021
Red Hat Enterprise Linux 8.4 Telecommunications Update Service

thunderbird-0:115.6.0-1.el8_4

Fixed · RHSA-2024:0028
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions

firefox-0:115.6.0-1.el8_4

Fixed · RHSA-2024:0021
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions

thunderbird-0:115.6.0-1.el8_4

Fixed · RHSA-2024:0028
Red Hat Enterprise Linux 8.6 Extended Update Support

firefox-0:115.6.0-1.el8_6

Fixed · RHSA-2024:0024
Red Hat Enterprise Linux 8.6 Extended Update Support

thunderbird-0:115.6.0-1.el8_6

Fixed · RHSA-2024:0005
Red Hat Enterprise Linux 8.8 Extended Update Support

firefox-0:115.6.0-1.el8_8

Fixed · RHSA-2024:0011
Red Hat Enterprise Linux 8.8 Extended Update Support

thunderbird-0:115.6.0-1.el8_8

Fixed · RHSA-2024:0004
Red Hat Enterprise Linux 9

firefox-0:115.6.0-1.el9_3

Fixed · RHSA-2024:0025
Red Hat Enterprise Linux 9

thunderbird-0:115.6.0-1.el9_3

Fixed · RHSA-2024:0001
Red Hat Enterprise Linux 9.0 Extended Update Support

firefox-0:115.6.0-1.el9_0

Fixed · RHSA-2024:0022
Red Hat Enterprise Linux 9.0 Extended Update Support

thunderbird-0:115.6.0-1.el9_0

Fixed · RHSA-2024:0002
Red Hat Enterprise Linux 9.2 Extended Update Support

firefox-0:115.6.0-1.el9_2

Fixed · RHSA-2024:0019
Red Hat Enterprise Linux 9.2 Extended Update Support

thunderbird-0:115.6.0-1.el9_2

Fixed · RHSA-2024:0029
Red Hat Enterprise Linux 6

firefox

Out of support scope
Red Hat Enterprise Linux 6

thunderbird

Out of support scope

Product	Package	State	Advisory
Red Hat Enterprise Linux 7	firefox-0:115.6.0-1.el7_9	Fixed	RHSA-2024:0026
Red Hat Enterprise Linux 7	thunderbird-0:115.6.0-1.el7_9	Fixed	RHSA-2024:0027
Red Hat Enterprise Linux 8	firefox-0:115.6.0-1.el8_9	Fixed	RHSA-2024:0012
Red Hat Enterprise Linux 8	thunderbird-0:115.6.0-1.el8_9	Fixed	RHSA-2024:0003
Red Hat Enterprise Linux 8.2 Advanced Update Support	firefox-0:115.6.0-1.el8_2	Fixed	RHSA-2024:0023
Red Hat Enterprise Linux 8.2 Advanced Update Support	thunderbird-0:115.6.0-1.el8_2	Fixed	RHSA-2024:0030
Red Hat Enterprise Linux 8.2 Telecommunications Update Service	firefox-0:115.6.0-1.el8_2	Fixed	RHSA-2024:0023
Red Hat Enterprise Linux 8.2 Telecommunications Update Service	thunderbird-0:115.6.0-1.el8_2	Fixed	RHSA-2024:0030
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions	firefox-0:115.6.0-1.el8_2	Fixed	RHSA-2024:0023
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions	thunderbird-0:115.6.0-1.el8_2	Fixed	RHSA-2024:0030
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	firefox-0:115.6.0-1.el8_4	Fixed	RHSA-2024:0021
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	thunderbird-0:115.6.0-1.el8_4	Fixed	RHSA-2024:0028
Red Hat Enterprise Linux 8.4 Telecommunications Update Service	firefox-0:115.6.0-1.el8_4	Fixed	RHSA-2024:0021
Red Hat Enterprise Linux 8.4 Telecommunications Update Service	thunderbird-0:115.6.0-1.el8_4	Fixed	RHSA-2024:0028
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions	firefox-0:115.6.0-1.el8_4	Fixed	RHSA-2024:0021
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions	thunderbird-0:115.6.0-1.el8_4	Fixed	RHSA-2024:0028
Red Hat Enterprise Linux 8.6 Extended Update Support	firefox-0:115.6.0-1.el8_6	Fixed	RHSA-2024:0024
Red Hat Enterprise Linux 8.6 Extended Update Support	thunderbird-0:115.6.0-1.el8_6	Fixed	RHSA-2024:0005
Red Hat Enterprise Linux 8.8 Extended Update Support	firefox-0:115.6.0-1.el8_8	Fixed	RHSA-2024:0011
Red Hat Enterprise Linux 8.8 Extended Update Support	thunderbird-0:115.6.0-1.el8_8	Fixed	RHSA-2024:0004
Red Hat Enterprise Linux 9	firefox-0:115.6.0-1.el9_3	Fixed	RHSA-2024:0025
Red Hat Enterprise Linux 9	thunderbird-0:115.6.0-1.el9_3	Fixed	RHSA-2024:0001
Red Hat Enterprise Linux 9.0 Extended Update Support	firefox-0:115.6.0-1.el9_0	Fixed	RHSA-2024:0022
Red Hat Enterprise Linux 9.0 Extended Update Support	thunderbird-0:115.6.0-1.el9_0	Fixed	RHSA-2024:0002
Red Hat Enterprise Linux 9.2 Extended Update Support	firefox-0:115.6.0-1.el9_2	Fixed	RHSA-2024:0019
Red Hat Enterprise Linux 9.2 Extended Update Support	thunderbird-0:115.6.0-1.el9_2	Fixed	RHSA-2024:0029
Red Hat Enterprise Linux 6	firefox	Out of support scope	n/a
Red Hat Enterprise Linux 6	thunderbird	Out of support scope	n/a

Remediation

Red Hat statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

Weaknesses (1)

CWE-20

Improper Input Validation

References (14)

https://access.redhat.com/security/cve/CVE-2023-6863
Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1868901
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2255369
Issue Tracking
https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-59067
Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
Mailing ListThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-6863
https://security.gentoo.org/glsa/202401-10
Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2023-6863
https://www.debian.org/security/2023/dsa-5581
Third Party Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6863
https://www.mozilla.org/en-US/security/advisories/mfsa2023-55/#CVE-2023-6863
https://www.mozilla.org/security/advisories/mfsa2023-54/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-55/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-56/
Vendor Advisory

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2023-6863		Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1868901		Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2255369		Issue Tracking
https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-59067		Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html		Mailing ListThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-6863
https://security.gentoo.org/glsa/202401-10		Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2023-6863
https://www.debian.org/security/2023/dsa-5581		Third Party Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6863
https://www.mozilla.org/en-US/security/advisories/mfsa2023-55/#CVE-2023-6863
https://www.mozilla.org/security/advisories/mfsa2023-54/		Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-55/		Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-56/		Vendor Advisory