CVE-2023-6867

Mozilla: Clickjacking permission prompts using the popup transition

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.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 5 more

CVE-2023-6865

Mozilla: Potential exposure of uninitialized data in <code>EncryptingOutputStream</code>

`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.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 5 more

CVE-2023-6863

Mozilla: Undefined behavior in <code>ShutdownObserver()</code>

The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVSS 3.1 · 8.8 High EPSS 1.0% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6862

Mozilla: Use-after-free in <code>nsDNSService</code>

A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. This vulnerability affects Firefox ESR < 115.6 and Thunderbird < 115.6.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Esr Thunderbird and 5 more

CVE-2023-6861

Mozilla: Heap buffer overflow affected <code>nsWindow::PickerOpen(void)</code> in headless mode

The `nsWindow::PickerOpen(void)` method was susceptible to a heap buffer overflow when running in headless mode. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVSS 3.1 · 8.8 High EPSS 1.4% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6860

Mozilla: Potential sandbox escape due to <code>VideoBridge</code> lack of texture validation

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.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6859

Mozilla: Use-after-free in PR_GetIdentitiesLayer

A use-after-free condition affected TLS socket creation when under memory pressure. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVSS 3.1 · 8.8 High EPSS 1.1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6857

Mozilla: Symlinks may resolve to smaller than expected buffers

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.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Apple Debian Google and 3 more

Products

Macos Debian Linux Android and 9 more

CVE-2023-6856

Mozilla: Heap-buffer-overflow affecting WebGL <code>DrawElementsInstanced</code> method with Mesa VM driver

The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVSS 3.1 · 8.8 High EPSS 20.6% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6212

Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5

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.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6209

Mozilla: Incorrect parsing of relative URLs starting with "///"

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.

CVSS 3.1 · 6.5 Medium EPSS 1.4% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6208

Mozilla: Using Selection API would copy contents into X11 primary selection.

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.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6207

Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer

Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6206

Mozilla: Clickjacking permission prompts using the fullscreen transition

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.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6205

Mozilla: Use-after-free in MessagePort::Entangled

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.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-6204

Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer

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.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-5730

Mozilla: Memory safety bugs fixed in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4

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. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

CVSS 3.1 · 9.8 Critical EPSS 1.5% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-5728

Mozilla: Improper object tracking during GC in the JavaScript engine could have led to a crash.

During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

CVSS 3.1 · 7.5 High EPSS 1.3% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-5725

Mozilla: WebExtensions could open arbitrary URLs

A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more

CVE-2023-5724

Mozilla: Large WebGL draw could have led to a crash

Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led to a crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

CVSS 3.1 · 7.5 High EPSS 1.5% KEV · Not listed

Vendors

Debian Mozilla Redhat

Products

Debian Linux Firefox Firefox Esr and 6 more