SB2020010834 - Algorithm Downgrade in firefox (Alpine package)
Published: January 8, 2020
Security Bulletin ID
SB2020010834
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Algorithm Downgrade (CVE-ID: CVE-2019-17023)
CWE-ID: CWE-757 - Selection of Less-Secure Algorithm During Negotiat
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to insecure negotiation After a HelloRetryRequest in Mozilla NSS that can lead to selection of a less secure protocol (e.g. TLS 1.2 or below) after the HelloRetryRequest TLS 1.3 is sent.
Remediation
Install update from vendor's website.