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Vulnerability · Published Jun 2, 2023 · Assigned by mozilla

CVE-2023-23605Memory safety bugs fixed in Firefox 109 and Firefox ESR 102.7

High 8.8

In plain English

A high-severity out-of-bounds write in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 46.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Mozilla developers and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 108 and Firefox ESR 102.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8firefox102.7.0-1.el8_7.almaALSA-2023:0288
AlmaLinux:9firefox102.7.0-1.el9_1.almaALSA-2023:0285
AlmaLinux:8thunderbird102.7.1-1.el8_7.almaALSA-2023:0463
AlmaLinux:9thunderbird102.7.1-1.el9_1.almaALSA-2023:0476
Alpine:v3.20firefox-esr102.7.0-r0ALPINE-CVE-2023-23605
Alpine:v3.21firefox-esr102.7.0-r0ALPINE-CVE-2023-23605
Alpine:v3.22firefox-esr102.7.0-r0ALPINE-CVE-2023-23605
Alpine:v3.23firefox-esr102.7.0-r0ALPINE-CVE-2023-23605
Debian:12firefox-esr102.7.0esr-1DEBIAN-CVE-2023-23605
Debian:13firefox-esr102.7.0esr-1DEBIAN-CVE-2023-23605
Debian:14firefox-esr102.7.0esr-1DEBIAN-CVE-2023-23605
Debian:12thunderbird1:102.7.1-1DEBIAN-CVE-2023-23605
Debian:13thunderbird1:102.7.1-1DEBIAN-CVE-2023-23605
Debian:14thunderbird1:102.7.1-1DEBIAN-CVE-2023-23605
Rocky Linux:8firefox0:102.7.0-1.el8_7RLSA-2023:0288
Rocky Linux:9firefox0:102.7.0-1.el9_1RLSA-2023:0285
Rocky Linux:8thunderbird0:102.7.1-1.el8_7RLSA-2023:0463
Rocky Linux:9thunderbird0:102.7.1-1.el9_1RLSA-2023:0476
Ubuntu:22.04:LTSmozjs78no fix listedUBUNTU-CVE-2023-23605
Ubuntu:22.04:LTSmozjs91no fix listedUBUNTU-CVE-2023-23605
Ubuntu:22.04:LTSthunderbird1:102.7.1+build2-0ubuntu0.22.04.1USN-5824-1
Ubuntu:22.04:LTSthunderbird1:102.7.1+build2-0ubuntu0.22.04.1UBUNTU-CVE-2023-23605

Affected products (as reported)

VendorProductVersions
Mozilla Firefox unspecified – before 109
Mozilla Firefox ESR unspecified – before 102.7
Mozilla Thunderbird unspecified – before 102.7

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References