The Citrix Access Gateway provides support for multiple authentication types. When utilizing the external legacy NTLM authentication module known as ntlm_authenticator the Access Gateway spawns the Samba 'samedit' command line utility to verify a user's identity and password. By embedding shell metacharacters in the web authentication form it is possible to execute arbitrary commands on the Access Gateway.
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Citrix Access Gateway Command Injection Enterprise Edition up to 9.2-49.8 and Standard and Advanced Editions prior to 5.0 suffer from a remote command injection vulnerability.
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