Mozilla Firefox vulnerabilities

CVE-2023-6870 [MEDIUM] CVE-2023-6870: Applications which spawn a Toast notification in a background thread may have obscured fullscreen no Applications which spawn a Toast notification in a background thread may have obscured fullscreen notifications displayed by Firefox. *This issue only affects Android versions of Firefox and Firefox Focus.* This vulnerability affects Firefox < 121.

CVE-2023-6872 [MEDIUM] CVE-2023-6872: Browser tab titles were being leaked by GNOME to system logs. This could potentially expose the brow Browser tab titles were being leaked by GNOME to system logs. This could potentially expose the browsing habits of users running in a private tab. This vulnerability affects Firefox < 121.

CVE-2023-6865 [MEDIUM] CVE-2023-6865: `EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be a `EncryptingOutputStream` was susceptible to exposing uninitialized data. This issue could only be abused in order to write data to a local disk which may have implications for private browsing mode. This vulnerability affects Firefox ESR < 115.6 and Firefox < 121.

CVE-2023-6135 [MEDIUM] CWE-203 CVE-2023-6135: Multiple NSS NIST curves were susceptible to a side-channel attack known as "Minerva". This attack c Multiple NSS NIST curves were susceptible to a side-channel attack known as "Minerva". This attack could potentially allow an attacker to recover the private key. This vulnerability affects Firefox < 121.

CVE-2023-6857 [MEDIUM] CWE-362 CVE-2023-6857: When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be sma When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary. *This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected.* This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVE-2023-6860 [MEDIUM] CVE-2023-6860: The `VideoBridge` allowed any content process to use textures produced by remote decoders. This cou The `VideoBridge` allowed any content process to use textures produced by remote decoders. This could be abused to escape the sandbox. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVE-2023-6867 [MEDIUM] CWE-1021 CVE-2023-6867: The timing of a button click causing a popup to disappear was approximately the same length as the a The timing of a button click causing a popup to disappear was approximately the same length as the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox ESR < 115.6 and Firefox < 121.

CVE-2023-6871 [MEDIUM] CVE-2023-6871: Under certain conditions, Firefox did not display a warning when a user attempted to navigate to a n Under certain conditions, Firefox did not display a warning when a user attempted to navigate to a new protocol handler. This vulnerability affects Firefox < 121.

CVE-2023-49060 [CRITICAL] CVE-2023-49060: An attacker could have accessed internal pages or data by ex-filtrating a security key from ReaderMo An attacker could have accessed internal pages or data by ex-filtrating a security key from ReaderMode via the `referrerpolicy` attribute. This vulnerability affects Firefox for iOS < 120.

CVE-2023-6213 [HIGH] CWE-787 CVE-2023-6213: Memory safety bugs present in Firefox 119. Some of these bugs showed evidence of memory corruption a Memory safety bugs present in Firefox 119. 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 < 120.

CVE-2023-6212 [HIGH] CWE-787 CVE-2023-6212: Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. Some of these b Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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 < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2023-6208 [HIGH] CVE-2023-6208: When using X11, text selected by the page using the Selection API was erroneously copied into the pr When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard. *This bug only affects Firefox on X11. Other systems are unaffected.* This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2023-6207 [HIGH] CWE-416 CVE-2023-6207: Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Fi Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2023-6206 [MEDIUM] CWE-1021 CVE-2023-6206: The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking dela The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2023-6205 [MEDIUM] CWE-416 CVE-2023-6205: It was possible to cause the use of a MessagePort after it had already been freed, which could poten It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2023-49061 [MEDIUM] CWE-601 CVE-2023-49061: An attacker could have performed HTML template injection via Reader Mode and exfiltrated user inform An attacker could have performed HTML template injection via Reader Mode and exfiltrated user information. This vulnerability affects Firefox for iOS < 120.

CVE-2023-6209 [MEDIUM] CWE-22 CVE-2023-6209: Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2023-6204 [MEDIUM] CWE-125 CVE-2023-6204: On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bo On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVE-2023-6211 [MEDIUM] CWE-1021 CVE-2023-6211: If an attacker needed a user to load an insecure http: page and knew that user had enabled HTTPS-onl If an attacker needed a user to load an insecure http: page and knew that user had enabled HTTPS-only mode, the attacker could have tricked the user into clicking to grant an HTTPS-only exception if they could get the user to participate in a clicking game. This vulnerability affects Firefox < 120.

CVE-2023-6210 [MEDIUM] CVE-2023-6210: When an https: web page created a pop-up from a "javascript:" URL, that pop-up was incorrectly allow When an https: web page created a pop-up from a "javascript:" URL, that pop-up was incorrectly allowed to load blockable content such as iframes from insecure http: URLs This vulnerability affects Firefox < 120.