CVE-2024-11705: 
NixOS vulnerability analysis and mitigation

CVE-2024-11705 is a vulnerability discovered in Mozilla Firefox and Thunderbird affecting versions prior to 133. The vulnerability was disclosed on November 26, 2024, and involves a null pointer dereference issue in the NSC_DeriveKey function (Mozilla Advisory, NVD).

The vulnerability occurs when NSCDeriveKey incorrectly assumes that the phKey parameter is always non-NULL. When passed as NULL, it results in a segmentation fault (SEGV). This behavior conflicts with the PKCS#11 v3.0 specification, which explicitly allows phKey to be NULL for certain mechanisms. The vulnerability has been assigned a CVSS 3.1 base score of 9.1 CRITICAL with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H and is classified as a NULL Pointer Dereference (CWE-476) ([CISA Advisory](https://www.cisecurity.org/advisory/multiple-vulnerabilities-in-mozilla-products-could-allow-for-arbitrary-code-execution2024-132)).

The vulnerability has been rated with a low impact severity by Mozilla. When exploited, it leads to application crashes due to segmentation faults, potentially causing service disruption (Mozilla Advisory).

The vulnerability has been fixed in Firefox 133 and Thunderbird 133. Users are advised to update their installations to these versions or later to mitigate the vulnerability (Mozilla Advisory).