Integer overflow in conf.c in Tinyproxy before 1.8.3 might allow remote attackers to bypass intended access restrictions in opportunistic circumstances via a TCP connection, related to improper handling of invalid port numbers.

acl.c in Tinyproxy before 1.8.3, when an Allow configuration setting specifies a CIDR block, permits TCP connections from all IP addresses, which makes it easier for remote attackers to hide the origin of web traffic by leveraging the open HTTP proxy server.

It was reported [1] that tinyproxy prior to version 1.8.3, when configured to allow a network range (i.e. "Allow 192.168.0.0/24" versus the default "Allow 127.0.0.1"), would allow any connections from any IP address, turning it into an open proxy. If tinyproxy were configured with one or more Allow statements that use an IP range, this would occur.

This has been fixed upstream [2] and affects the versions of tinyproxy as provided by Fedora and EPEL.

[1] https://banu.com/bugzilla/showbug.cgi?id=90 [2] https://banu.com/cgit/tinyproxy/commit/?id=e8426f6662dc467bd1d827100481b95d9a4a23e4

Rejected reason: This CVE ID is a duplicate of CVE-2022-40468