SB2018060723 - Security restrictions bypass in Cisco Web Security Appliance
Published: June 7, 2018
Security Bulletin ID
SB2018060723
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 security vulnerability.
1) Security restrictions bypass (CVE-ID: CVE-2018-0353)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists in traffic-monitoring functions in Cisco Web Security Appliance (WSA) due to a change in the underlying operating system software that is responsible for monitoring affected traffic. A remote unauthenticated attacker can send a specially crafted IP packets, circumvent Layer 4 Traffic Monitor (L4TM) functionality, pass traffic through the device, which the WSA was configured to deny.
Remediation
Install update from vendor's website.