CVE-2024-7531

Description

Calling `PK11_Encrypt()` in NSS using CKM_CHACHA20 and the same buffer for input and output can result in plaintext on an Intel Sandy Bridge processor. In Firefox this only affects the QUIC header protection feature when the connection is using the ChaCha20-Poly1305 cipher suite. The most likely outcome is connection failure, but if the connection persists despite the high packet loss it could be possible for a network observer to identify packets as coming from the same source despite a network path change. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.11%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Firefox ESR
Affected: Mozilla Firefox ESR
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2024-7531?
CVE-2024-7531 has been scored as a medium severity vulnerability.
How to fix CVE-2024-7531?
To fix CVE-2024-7531, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-7531 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-7531 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-7531?
CVE-2024-7531 affects Mozilla Firefox, Mozilla Firefox ESR, Mozilla Firefox ESR.
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