Zero-day vulnerability in Citrix Access Gateway

Improper control of a resource through its lifetime
CVE-2022-27518

Vulnerability details

Advisory: SB2022121373 - Remote code execution in Citrix ADC and Citrix Gateway

Vulnerable component: Citrix Access Gateway

CVE-ID: CVE-2022-27518

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

Description:

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper access restrictions in systems configured as a SAML SP or a SAML IdP. A remote non-authenticated attacker can gain unauthorized access to the system.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://support.citrix.com/article/CTX474995/citrix-adc-and-citrix-gateway-security-bulletin-for-cve202227518

https://www.citrix.com/blogs/2022/12/13/critical-security-update-now-available-for-citrix-adc-citrix-gateway/


About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.