SB2020091516 - Denial of service in MikroTik RouterOS
Published: September 15, 2020 Updated: September 21, 2020
Security Bulletin ID
SB2020091516
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Validation of Array Index (CVE-ID: CVE-2020-11881)
CWE-ID: CWE-129 - Improper Validation of Array Index
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
The vulnerability allows a remote attacker to perform denial of service attack.
The vulnerability exists due to improper validation of array index when processing setup-requests in a built-in SMB server. A remote non-authenticated attacker can send specially crafted setup-request packets and crash the SMB server.
Remediation
Install update from vendor's website.