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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
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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
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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
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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
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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
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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
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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
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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
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Debian Mozilla Redhat
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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
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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
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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
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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
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CVE-2023-5721

Mozilla: Queued up rendering could have allowed websites to clickjack

It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an insufficient activation-delay. 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
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CVE-2023-5171

Mozilla: Use-after-free in Ion Compiler

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. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.

CVSS 3.1 · 6.5 Medium EPSS 1.1% KEV · Not listed
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CVE-2023-5169

Mozilla: Out-of-bounds write in PathOps

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. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.

CVSS 3.1 · 6.5 Medium EPSS 1.1% KEV · Not listed
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Debian Fedoraproject Mozilla and 1 more
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CVE-2023-34416

Mozilla: Memory safety bugs fixed in Firefox 114 and Firefox ESR 102.12

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 vulnerability affects Firefox ESR < 102.12, Firefox < 114, and Thunderbird < 102.12.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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CVE-2023-4056

Mozilla: Memory safety bugs fixed in Firefox 116, Firefox ESR 115.1, Firefox ESR 102.14, Thunderbird 115.1, and Thunderbird 102.14

Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. 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 < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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Debian Mozilla Redhat
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CVE-2023-4055

Mozilla: Cookie jar overflow caused unexpected cookie jar state

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 affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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Debian Mozilla Redhat
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CVE-2023-4050

Mozilla: Stack buffer overflow in StorageManager

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 Firefox ESR < 115.1.

CVSS 3.1 · 7.5 High EPSS 12.6% KEV · Not listed
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Debian Mozilla Redhat
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CVE-2023-4048

Mozilla: Crash in DOMParser due to out-of-memory conditions

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.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Debian Mozilla Redhat
Products
Debian Linux Firefox Firefox Esr and 5 more