SB2017122804 - Security restrictions bypass in firefox-esr (Alpine package)
Published: December 28, 2017
Security Bulletin ID
SB2017122804
CSH Severity
Low
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) Security restrictions bypass (CVE-ID: CVE-2017-7843)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The weakness exists in web worker while in Private Browsing mode due to improper input validation. A remote attacker can trick the victim into visiting a specially crafted website, bypass private-browsing protections and uniquely fingerprint visitors.to write persistent data to IndexedDB, which was not cleared when exiting and would persist across multiple sessions.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=21febb02a03ed44bde98b19a5e38d54a2ac01c33
- https://git.alpinelinux.org/aports/commit/?id=42d0fe5b17329c55a287471860d50478d65c8669
- https://git.alpinelinux.org/aports/commit/?id=26701b74f891400a545844d0ba4f616001b15944
- https://git.alpinelinux.org/aports/commit/?id=ce1893a60404d9954a620738b865fe7d085a0019