VAR-200909-0582
Vulnerability from variot - Updated: 2022-05-17 01:51Nginx is a multi-platform HTTP server and mail proxy server. Nginx maintains an internal DNS cache for the parsed domain name, but in the search cache, nginx only checks if the name's crc32 matches and the short name is a long name prefix, but does not check if the names are equal in length. If nginx is configured as a proxy cache, the remote attacker can spoof the domain name through DNS poisoning attacks, tricking the user into believing that the domain name being accessed is legitimate. This issue can be exploited when nginx is configured to act as a forward proxy, but this is a nonstandard and unsupported configuration. Attacks against other configurations may also be possible. Successful exploits may allow remote attackers to intercept traffic intended for legitimate websites, which may aid in further attacks
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Nomenclature
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