Detections
Analytics
Cisco Adaptive Security Appliance Software WebVPN CRLF Injection (cisco-sa-asa-ftd-crlf-inj-BX9uRwSn)
medium Nessus Plugin ID 149526
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Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, the Clientless SSL VPN (WebVPN) of Cisco Adaptive Security Appliance (ASA) Software is affected by an CRLF injection vulnerability due to improper input sanitization. An unauthenticated, remote attacker can exploit this by persuading a user of the interface to click a crafted link which could allow the attacker to conduct a CRLF injection attack, adding arbitrary HTTP headers in the responses of the system and redirecting the user to arbitrary websites.Please see the included Cisco BID and Cisco Security Advisory for more information.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvt18028See Also
Plugin Details
Severity: Medium
ID: 149526
File Name: cisco-sa-asa-ftd-crlf-inj-BX9uRwSn-asa.nasl
Version: 1.7
Type: local
Family: CISCO
Published: 5/17/2021
Updated: 3/31/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 1.6
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2020-3561
CVSS v3
Risk Factor: Medium
Base Score: 4.7
Temporal Score: 4.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:cisco:adaptive_security_appliance_software
Required KB Items: Host/Cisco/ASA
Exploit Ease: No known exploits are available
Patch Publication Date: 10/21/2020
Vulnerability Publication Date: 10/21/2020
Reference Information
CVE: CVE-2020-3561