SB2020070152 - Input validation error in firefox (Alpine package)
Published: July 1, 2020
Security Bulletin ID
SB2020070152
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2020-12417)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform cache poisoning attack.
The vulnerability exists due to an error when processing the %2F character in a manifest URL, which results in Firefox's AppCache behavior to become confused and allowe a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=50b9c9305ecf9f2f8a410c6ea4061b862e0d90d3
- https://git.alpinelinux.org/aports/commit/?id=e4a686c2dde77849f3b4deb5bddc8f12226d6c28
- https://git.alpinelinux.org/aports/commit/?id=ec5f4ee787ff7c93554db1adad3f948797da3871
- https://git.alpinelinux.org/aports/commit/?id=9fdb676f9b442b62e9679953f32613ee3c3f82e1
- https://git.alpinelinux.org/aports/commit/?id=692a20732e84f5c97fd8312b369d43fc43c7bfc5
- https://git.alpinelinux.org/aports/commit/?id=9479fd03dc65a7561e26946980c924c4147e42d2
- https://git.alpinelinux.org/aports/commit/?id=02f4c40162bc3c2f611ce86613bbf01f13e6146b
- https://git.alpinelinux.org/aports/commit/?id=7ece421265010e81e06c3b8b9137b0b62f7acc73