===================================================================== CERT-Renater Note d'Information No. 2023/VULN440 _____________________________________________________________________ DATE : 26/10/2023 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Firefox versions prior to 119, for iOS 119, ESR 115.4. ===================================================================== https://www.mozilla.org/en-US/security/advisories/mfsa2023-45/ https://www.mozilla.org/en-US/security/advisories/mfsa2023-48/ https://www.mozilla.org/en-US/security/advisories/mfsa2023-46/ _____________________________________________________________________ Mozilla Foundation Security Advisory 2023-45 Security Vulnerabilities fixed in Firefox 119 Announced October 24, 2023 Impact high Products Firefox Fixed in Firefox 119 #CVE-2023-5721: Queued up rendering could have allowed websites to clickjack Reporter Kelsey Gilbert Impact high Description It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an insufficient activation-delay. References Bug 1830820 #CVE-2023-5722: Cross-Origin size and header leakage Reporter annevk Impact moderate Description Using iterative requests an attacker was able to learn the size of an opaque response, as well as the contents of a server-supplied Vary header. References Bug 1738426 #CVE-2023-5723: Invalid cookie characters could have led to unexpected errors Reporter Daniel Veditz Impact moderate Description An attacker with temporary script access to a site could have set a cookie containing invalid characters using document.cookie that could have led to unknown errors. References Bug 1802057 #CVE-2023-5724: Large WebGL draw could have led to a crash Reporter pwn2car Impact moderate Description Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led to a crash. References Bug 1836705 #CVE-2023-5725: WebExtensions could open arbitrary URLs Reporter Shaheen Fazim Impact moderate Description A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data. References Bug 1845739 #CVE-2023-5726: Full screen notification obscured by file open dialog on macOS Reporter Edgar Chen and Hafiizh Impact moderate Description A website could have obscured the full screen notification by using the file open dialog. This could have led to user confusion and possible spoofing attacks. Note: This issue only affected macOS operating systems. Other operating systems are unaffected. References Bug 1846205 #CVE-2023-5727: Download Protections were bypassed by .msix, .msixbundle, .appx, and .appxbundle files on Windows Reporter Marco Bonardo Impact moderate Description The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle files, which can run commands on a user's computer. Note: This issue only affected Windows operating systems. Other operating systems are unaffected. References Bug 1847180 #CVE-2023-5728: Improper object tracking during GC in the JavaScript engine could have led to a crash. Reporter anbu Impact moderate Description During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. References Bug 1852729 #CVE-2023-5729: Fullscreen notification dialog could have been obscured by WebAuthn prompts Reporter Shaheen Fazim Impact low Description A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This could have obscured the fullscreen notification and could have been leveraged in a spoofing attack. References Bug 1823720 #CVE-2023-5730: Memory safety bugs fixed in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4.1 Reporter Jed Davis, Andrew McCreight, Randell Jesup, and the Mozilla Fuzzing Team Impact high Description Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. 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 119, Firefox ESR 115.4, and Thunderbird 115.4.1 #CVE-2023-5731: Memory safety bugs fixed in Firefox 119 Reporter Steve Fink, Stefan Arentz, and the Mozilla Fuzzing Team Impact high Description Memory safety bugs present in Firefox 118. 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 119 _____________________________________________________________________ Mozilla Foundation Security Advisory 2023-48 Security Vulnerabilities fixed in Firefox for iOS 119 Announced October 24, 2023 Impact high Products Firefox for iOS Fixed in Firefox for iOS 119 #CVE-2023-5758: Cross-Site Scripting (XSS) in reader mode Reporter Irwan Impact high Description When opening a page in reader mode, the redirect URL could have caused attacker-controlled script to execute in a reflected Cross-Site Scripting (XSS) attack. References Bug 1850019 _____________________________________________________________________ Mozilla Foundation Security Advisory 2023-46 Security Vulnerabilities fixed in Firefox ESR 115.4 Announced October 24, 2023 Impact high Products Firefox ESR Fixed in Firefox ESR 115.4 #CVE-2023-5721: Queued up rendering could have allowed websites to clickjack Reporter Kelsey Gilbert Impact high Description It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an insufficient activation-delay. References Bug 1830820 #CVE-2023-5732: Address bar spoofing via bidirectional characters Reporter Armin Ebert Impact moderate Description An attacker could have created a malicious link using bidirectional characters to spoof the location in the address bar when visited. References Bug 1690979 Bug 1836962 #CVE-2023-5724: Large WebGL draw could have led to a crash Reporter pwn2car Impact moderate Description Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led to a crash. References Bug 1836705 #CVE-2023-5725: WebExtensions could open arbitrary URLs Reporter Shaheen Fazim Impact moderate Description A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data. References Bug 1845739 #CVE-2023-5726: Full screen notification obscured by file open dialog on macOS Reporter Edgar Chen and Hafiizh Impact moderate Description A website could have obscured the full screen notification by using the file open dialog. This could have led to user confusion and possible spoofing attacks. Note: This issue only affected macOS operating systems. Other operating systems are unaffected. References Bug 1846205 #CVE-2023-5727: Download Protections were bypassed by .msix, .msixbundle, .appx, and .appxbundle files on Windows Reporter Marco Bonardo Impact moderate Description The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle files, which can run commands on a user's computer. Note: This issue only affected Windows operating systems. Other operating systems are unaffected. References Bug 1847180 #CVE-2023-5728: Improper object tracking during GC in the JavaScript engine could have led to a crash. Reporter anbu Impact moderate Description During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. References Bug 1852729 #CVE-2023-5730: Memory safety bugs fixed in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4.1 Reporter Randell Jesup, Andrew McCreight, Jed Davis, and the Mozilla Fuzzing Team Impact high Description Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. 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 119, Firefox ESR 115.4, and Thunderbird 115.4.1 ========================================================= + 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 + =========================================================