CVE-2018-0353

Description

A vulnerability in traffic-monitoring functions in Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to circumvent Layer 4 Traffic Monitor (L4TM) functionality and bypass security protections. The vulnerability is due to a change in the underlying operating system software that is responsible for monitoring affected traffic. An attacker could exploit this vulnerability by sending crafted IP packets to an affected device. A successful exploit could allow the attacker to pass traffic through the device, which the WSA was configured to deny. This vulnerability affects both IPv4 and IPv6 traffic. This vulnerability affects Cisco AsyncOS versions for WSA on both virtual and hardware appliances running any release of the 10.5.1, 10.5.2, or 11.0.0 WSA Software. The WSA is vulnerable if it is configured for L4TM. Cisco Bug IDs: CSCvg78875.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.04% Top 25%
Vendor Advisory cisco.com
Affected: n/a Cisco Web Security Appliance unknown
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/104417 vdb entry third party advisory
http://www.securitytracker.com/id/1041081 vdb entry third party advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-wsa vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-0353?
CVE-2018-0353 has been scored as a high severity vulnerability.
How to fix CVE-2018-0353?
To fix CVE-2018-0353, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-0353 being actively exploited in the wild?
It is possible that CVE-2018-0353 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-0353?
CVE-2018-0353 affects n/a Cisco Web Security Appliance unknown.
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