SB2019050652 - Symlink attack in mercurial (Alpine package)
Published: May 6, 2019
Security Bulletin ID
SB2019050652
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 security vulnerability.
1) Symlink attack (CVE-ID: CVE-2019-3902)
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue. A remote user can create a specially crafted symbolic link to and write files outside a repository.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=e30587e6d086657c2b20040a01408e6a321fc5fc
- https://git.alpinelinux.org/aports/commit/?id=cfa31bbcb6d2842fc65e144769cdd9e246600584
- https://git.alpinelinux.org/aports/commit/?id=62755c77c68aad877b194aa2678fb06b337091ea
- https://git.alpinelinux.org/aports/commit/?id=87765f5b665bb32c812b026658f7b2fdc4d1c816
- https://git.alpinelinux.org/aports/commit/?id=0012ca0681bdad7f646920585fa58905c7e30cee
- https://git.alpinelinux.org/aports/commit/?id=02e8c94d8877d6acdff3f6bde864ba4b5cf6b985