SB2020060234 - Race condition in firefox-esr (Alpine package)
Published: June 2, 2020
Security Bulletin ID
SB2020060234
Severity
Medium
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 security vulnerability.
1) Race condition (CVE-ID: CVE-2020-12399)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to time differences in Mozilla NSS library during the process of generating a DSA signature, the nonce value 'k' is not padded, exposing the bit length. Combined with other techniques, this can result in the recovery of the DSA private key.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=aadba671901181be240a1d151a9f3a04f2ce3ca5
- https://git.alpinelinux.org/aports/commit/?id=37e37d549603b29c55fafcde8f3732cfb9db1640
- https://git.alpinelinux.org/aports/commit/?id=c3bc99eb0be5fedab0fdd751a54afe87028c920b
- https://git.alpinelinux.org/aports/commit/?id=da1c1b9ae466f66ae95fc66418a02c3ae10be583
- https://git.alpinelinux.org/aports/commit/?id=5d9ca1b5fa041ac0d09e2bd2038f505e06c7d7f5
- https://git.alpinelinux.org/aports/commit/?id=b3181176e64948e2cd534829b0e3883aed67a27c
- https://git.alpinelinux.org/aports/commit/?id=66010d68451b4eac4d3f7315739fd156bd840f21
- https://git.alpinelinux.org/aports/commit/?id=8dc0bf1501171d97e4b280f12987e24bf3cc53f7