SB2021011811 - Information disclosure in Cisco StarOS for Cisco ASR 5000 Series Routers
Published: January 18, 2021
Security Bulletin ID
SB2021011811
CSH 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 vulnerability.
1) UNIX symbolic link following (CVE-ID: CVE-2021-1145)
CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to sensitive information on the system.
The vulnerability exists due to a symlink following issue in the Secure FTP (SFTP). A remote authenticated attacker can send a specially crafted SFTP command and read arbitrary files on the affected device.
Remediation
Install update from vendor's website.