Firefox ESR vulnerabilities
167 known vulnerabilities in Firefox ESR from Mozilla. 167 are rated high or critical, and 9 have been exploited in real attacks. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.
Latest first
- 7.5 High severity
Firefox: Buffer Copy without Checking Size of Input
When the number of cookies per domain was exceeded in `document.cookie`, the actual cookie jar sent to the host was no longer consistent with expected cookie jar state. This could have caused requests to be sent with some cookies missing. This vulnerability af
- 7.5 High severity
Firefox: Out-of-bounds Write
In some cases, an untrusted input stream was copied to a stack buffer without checking its size. This resulted in a potentially exploitable crash which could have led to a sandbox escape. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Fire
- 7.5 High severity
Firefox: Out-of-bounds Read
An out-of-bounds read could have led to an exploitable crash when parsing HTML with DOMParser in low memory situations. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
- 8.8 High severity
Firefox: Cross-Site Request Forgery
A bug in popup notifications delay calculation could have made it possible for an attacker to trick a user into granting permissions. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
- 8.8 High severity
Firefox: Use After Free
During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash. This vulnerability affects Firefox < 115.0.2, Firefox ESR < 115.0.2, and Thunderbird < 115.0.1.
- 8.8 High severity
Firefox: Out-of-bounds Write
Memory safety bugs present in Firefox 114, Firefox ESR 102.12, and Thunderbird 102.12. 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 vulnerabil
- 7.8 High severity
Firefox: Unrestricted Upload of File with Dangerous Type
When opening Diagcab files, Firefox did not warn the user that these files may contain malicious code. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.
- 8.8 High severity
Firefox: Use After Free
Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.
- 8.8 High severity
Firefox: Use After Free
An attacker could have triggered a use-after-free condition when creating a WebRTC connection over HTTPS. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.
- 9.8 Critical severity
Firefox ESR: Out-of-bounds Write
Memory safety bugs present in Firefox 113, Firefox ESR 102.11, and Thunderbird 102.12. 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 vulnerabil
- 9.8 Critical severity
Firefox: Out-of-bounds Write
An attacker could have caused an out of bounds memory access using WebGL APIs, leading to memory corruption and a potentially exploitable crash. *This bug only affects Firefox and Thunderbird for macOS. Other operating systems are unaffected.* This vulnerabili
- 8.8 High severity
Firefox: Out-of-bounds Write
Mozilla developers and community members Gabriele Svelto, Andrew Osmond, Emily McDonough, Sebastian Hengst, Andrew McCreight and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 112 and Firefox ESR 102.10. Some of these bugs showed evide
- 8.8 High severity
Firefox: Use of Uninitialized Resource
When reading a file, an uninitialized value could have been used as read limit. This vulnerability affects Firefox < 113, Firefox ESR < 102.11, and Thunderbird < 102.11.
- 8.8 High severity
Firefox: Authentication Bypass by Spoofing
A missing delay in popup notifications could have made it possible for an attacker to trick a user into granting permissions. This vulnerability affects Firefox < 113, Firefox ESR < 102.11, and Thunderbird < 102.11.
- 8.8 High severity
Firefox: Improper Encoding or Escaping of Output
Firefox did not properly handle downloads of files ending in <code>.desktop</code>, which can be interpreted to run attacker-controlled commands. <br>*This bug only affects Firefox for Linux on certain Distributions. Other operating systems are unaffected, and
- 8.8 High severity
Firefox: NULL Pointer Dereference
When handling the filename directive in the Content-Disposition header, the filename would be truncated if the filename contained a NULL character. This could have led to reflected file download attacks potentially tricking users to install malware. This vulne
- 8.8 High severity
Firefox: Use After Free
An attacker could cause the memory manager to incorrectly free a pointer that addresses attacker-controlled memory, resulting in an assertion, memory corruption, or a potentially exploitable crash. This vulnerability affects Firefox < 112, Focus for Android <
- 8.8 High severity
Firefox: Out-of-bounds Write
Memory safety bugs present in Firefox 110 and Firefox ESR 102.8. 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 <
- 8.8 High severity
Firefox: Incorrect Type Conversion or Cast
While implementing AudioWorklets, some code may have casted one type to another, invalid, dynamic type. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.
- 8.8 High severity
Thunderbird: Out-of-bounds Write
Memory safety bugs present in Firefox ESR 102.7. 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 Thunderbird < 102.8 and Fi
- 8.8 High severity
Firefox: Out-of-bounds Write
Mmemory safety bugs present in Firefox 109 and Firefox ESR 102.7. 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 <
- 7.5 High severity
Firefox: Authentication Bypass by Spoofing
A lack of in app notification for entering fullscreen mode could have lead to a malicious website spoofing browser chrome.<br>*This bug only affects Firefox Focus. Other versions of Firefox are unaffected.*. This vulnerability affects Firefox < 110 and Firefox
- 8.8 High severity
Firefox: Use After Free
Module load requests that failed were not being checked as to whether or not they were cancelled causing a use-after-free in <code>ScriptLoadContext</code>. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
- 8.8 High severity
Firefox: Incorrect Type Conversion or Cast
An invalid downcast from <code>nsTextNode</code> to <code>SVGElement</code> could have lead to undefined behavior. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
- 8.8 High severity
Firefox: Use After Free
Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free after unwrapping the proxy. This vulnerability affects Firefox < 110, Thunderbird < 102.8,
- 8.1 High severity
Firefox: URL Redirection to Untrusted Site
After downloading a Windows <code>.url</code> shortcut from the local filesystem, an attacker could supply a remote path that would lead to unexpected network requests from the operating system. This also had the potential to leak NTLM credentials to the resou
- 8.8 High severity
Firefox: Out-of-bounds Write
When encoding data from an <code>inputStream</code> in <code>xpcom</code> the size of the input being encoded was not correctly calculated potentially leading to an out of bounds memory write. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and
- 8.8 High severity
Firefox: Incorrect Authorization
Permission prompts for opening external schemes were only shown for <code>ContentPrincipals</code> resulting in extensions being able to open them without user interaction via <code>ExpandedPrincipals</code>. This could lead to further malicious actions such a
- 8.8 High severity
Firefox: Out-of-bounds Write
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
- 9.8 Critical severity
Firefox: Use After Free
A use-after-free in WebGL extensions could have led to a potentially exploitable crash. This vulnerability affects Firefox < 107, Firefox ESR < 102.6, and Thunderbird < 102.6.
- 8.8 High severity
Firefox: Out-of-bounds Write
An optimization in WebGL was incorrect in some cases, and could have led to memory corruption and a potentially exploitable crash. *Note*: This advisory was added on December 13th, 2022 after we better understood the impact of the issue. The fix was included i
- 8.8 High severity
Firefox: Out-of-bounds Write
Mozilla developers Randell Jesup, Valentin Gosu, Olli Pettay, and the Mozilla Fuzzing Team reported memory safety bugs present in Thunderbird 102.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these co
- 8.8 High severity
Firefox: Improper Control of Generation of Code
A file with a long filename could have had its filename truncated to remove the valid extension, leaving a malicious extension in its place. This could potentially led to user confusion and the execution of malicious code.<br/>*Note*: This issue was originally
- 8.6 High severity
Firefox: Out-of-bounds Read
An attacker who compromised a content process could have partially escaped the sandbox to read arbitrary files via clipboard-related IPC messages.<br>*This bug only affects Thunderbird for Linux. Other operating systems are unaffected.*. This vulnerability aff
- 8.8 High severity
Firefox ESR: Out-of-bounds Write
Mozilla developers Andrew McCreight and Gabriele Svelto reported memory safety bugs present in Thunderbird 102.4. 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 arbi
- 8.8 High severity
Firefox ESR: Improper Link Resolution Before File Access
When resolving a symlink such as <code>file:///proc/self/fd/1</code>, an error message may be produced where the symlink was resolved to a string containing unitialized memory in the buffer. <br>*This bug only affects Thunderbird on Unix-based operated systems
- 8.8 High severity
Firefox ESR: Use After Free
The garbage collector could have been aborted in several states and zones and <code>GCRuntime::finishCollection</code> may not have been called, leading to a use-after-free and potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thun
- 9.8 Critical severity
Firefox ESR: Use After Free
If an out-of-memory condition occurred when creating a JavaScript global, a JavaScript realm may be deleted while references to it lived on in a BaseShape. This could lead to a use-after-free causing a potentially exploitable crash. This vulnerability affects
- 8.8 High severity
Firefox: Out-of-bounds Write
Mozilla developers Ashley Hale and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 105 and Firefox ESR 102.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been e
- 8.8 High severity
Firefox: NULL Pointer Dereference
Certain types of allocations were missing annotations that, if the Garbage Collector was in a specific state, could have lead to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 106, Firefox ESR < 102.4, and Thunderbi