CVE-2020-5929

Description

In versions 13.0.0-13.0.0 HF2, 12.1.0-12.1.2 HF1, and 11.6.1-11.6.2, BIG-IP platforms with Cavium Nitrox SSL hardware acceleration cards, a Virtual Server configured with a Client SSL profile, and using Anonymous (ADH) or Ephemeral (DHE) Diffie-Hellman key exchange and Single DH use option not enabled in the options list may be vulnerable to crafted SSL/TLS Handshakes that may result with a PMS (Pre-Master Secret) that starts in a 0 byte and may lead to a recovery of plaintext messages as BIG-IP TLS/SSL ADH/DHE sends different error messages acting as an oracle. Similar error messages when PMS starts with 0 byte coupled with very precise timing measurement observation may also expose this vulnerability.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.67% Top 30%
Vendor Advisory f5.com
Affected: n/a BIG-IP
Published at:
Updated at:

References

Link Tags
https://support.f5.com/csp/article/K91158923 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-5929?
CVE-2020-5929 has been scored as a medium severity vulnerability.
How to fix CVE-2020-5929?
To fix CVE-2020-5929, 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-2020-5929 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-5929 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-5929?
CVE-2020-5929 affects n/a BIG-IP.
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