Vulnerability CVE-2018-0353

Vulnerability Name:

CVE-2018-0353 (CCN-144443)

Assigned:

2017-11-27

Published:

2018-06-06

Updated:

2019-10-09

Summary:

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.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): High Availibility (A): None

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:C/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Complete Availibility (A): None

Vulnerability Type:

CWE-noinfo

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2018-0353

Source: BID
Type: Third Party Advisory, VDB Entry
104417

Source: CCN
Type: BID-104417
Cisco Web Security Appliance CVE-2018-0353 Remote Security Bypass Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1041081

Source: XF
Type: UNKNOWN
cisco-wsa-cve20180353-sec-bypass(144443)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20180606-wsa
Cisco Web Security Appliance Layer 4 Traffic Monitor Security Bypass Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-wsa

Vulnerable Configuration:

Configuration 1:

cpe:/a:cisco:web_security_appliance:10.5.1:*:*:*:*:*:*:*

OR cpe:/a:cisco:web_security_appliance:10.5.1-296:*:*:*:*:*:*:*

OR cpe:/a:cisco:web_security_appliance:10.5.2:*:*:*:*:*:*:*

OR cpe:/a:cisco:web_security_appliance:11.0.0:*:*:*:*:*:*:*

OR cpe:/a:cisco:web_security_appliance:11.5.0-fcs-442:*:*:*:*:*:*:*

Denotes that component is vulnerable

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