===================================================================== CERT-Renater Note d'Information No. 2023/VULN360 _____________________________________________________________________ DATE : 28/09/2023 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Firefox versions prior to 118, ESR 115.3. ===================================================================== https://www.mozilla.org/en-US/security/advisories/mfsa2023-41/ https://www.mozilla.org/en-US/security/advisories/mfsa2023-42/ _____________________________________________________________________ Mozilla Foundation Security Advisory 2023-41 Security Vulnerabilities fixed in Firefox 118 Announced September 26, 2023 Impact high Products Firefox Fixed in Firefox 118 #CVE-2023-5168: Out-of-bounds write in FilterNodeD2D1 Reporter sonakkbi Impact high Description A compromised content process could have provided malicious data to FilterNodeD2D1 resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. This bug only affects Firefox on Windows. Other operating systems are unaffected. References Bug 1846683 #CVE-2023-5169: Out-of-bounds write in PathOps Reporter sonakkbi Impact high Description A compromised content process could have provided malicious data in a PathRecording resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. References Bug 1846685 #CVE-2023-5170: Memory leak from a privileged process Reporter sonakkbi Impact high Description In canvas rendering, a compromised content process could have caused a surface to change unexpectedly, leading to a memory leak of a privileged process. This memory leak could be used to effect a sandbox escape if the correct data was leaked. References Bug 1846686 #CVE-2023-5171: Use-after-free in Ion Compiler Reporter Lukas Bernhard Impact high Description During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. References Bug 1851599 #CVE-2023-5172: Memory Corruption in Ion Hints Reporter Mozilla Fuzzing Team Impact high Description A hashtable in the Ion Engine could have been mutated while there was a live interior reference, leading to a potential use-after-free and exploitable crash. References Bug 1852218 #CVE-2023-5173: Out-of-bounds write in HTTP Alternate Services Reporter Ronald Crane Impact moderate Description In a non-standard configuration of Firefox, an integer overflow could have occurred based on network traffic (possibly under influence of a local unprivileged webpage), leading to an out-of-bounds write to privileged process memory. This bug only affects Firefox if a non-standard preference allowing non-HTTPS Alternate Services (network.http.altsvc.oe) is enabled. References Bug 1823172 #CVE-2023-5174: Double-free in process spawning on Windows Reporter Ronald Crane Impact moderate Description If Windows failed to duplicate a handle during process creation, the sandbox code may have inadvertently freed a pointer twice, resulting in a use-after-free and a potentially exploitable crash. This bug only affects Firefox on Windows when run in non-standard configurations (such as using runas). Other operating systems are unaffected. References Bug 1848454 #CVE-2023-5175: Use-after-free of ImageBitmap during process shutdown Reporter Yangkang of 360 ATA Team Impact low Description During process shutdown, it was possible that an ImageBitmap was created that would later be used after being freed from a different codepath, leading to a potentially exploitable crash. References Bug 1849704 #CVE-2023-5176: Memory safety bugs fixed in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3 Reporter Chris Peterson, Andrew McCreight, André Bargull, Nika Layzell and the Mozilla Fuzzing Team Impact high Description Memory safety bugs present in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2. 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. References Memory safety bugs fixed in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3 _____________________________________________________________________ Mozilla Foundation Security Advisory 2023-42 Security Vulnerabilities fixed in Firefox ESR 115.3 Announced September 26, 2023 Impact high Products Firefox ESR Fixed in Firefox ESR 115.3 #CVE-2023-5168: Out-of-bounds write in FilterNodeD2D1 Reporter sonakkbi Impact high Description A compromised content process could have provided malicious data to FilterNodeD2D1 resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. This bug only affects Firefox on Windows. Other operating systems are unaffected. References Bug 1846683 #CVE-2023-5169: Out-of-bounds write in PathOps Reporter sonakkbi Impact high Description A compromised content process could have provided malicious data in a PathRecording resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. References Bug 1846685 #CVE-2023-5171: Use-after-free in Ion Compiler Reporter Lukas Bernhard Impact high Description During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. References Bug 1851599 #CVE-2023-5174: Double-free in process spawning on Windows Reporter Ronald Crane Impact moderate Description If Windows failed to duplicate a handle during process creation, the sandbox code may have inadvertently freed a pointer twice, resulting in a use-after-free and a potentially exploitable crash. This bug only affects Firefox on Windows when run in non-standard configurations (such as using runas). Other operating systems are unaffected. References Bug 1848454 #CVE-2023-5176: Memory safety bugs fixed in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3 Reporter Chris Peterson, Andrew McCreight, André Bargull, Nika Layzell and the Mozilla Fuzzing Team Impact high Description Memory safety bugs present in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2. 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. References Memory safety bugs fixed in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3 ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================