anacrolix/torrent through 1.61.0 Memory Exhaustion via Unbounded HTTP Tracker Response

anacrolix/torrent through 1.61.0 contains a memory exhaustion vulnerability in the tracker/http package that allows malicious trackers to crash clients by returning unbounded responses. Attackers controlling an HTTP tracker in a torrent file or magnet link can return huge or gzip-compressed announce or scrape responses that Client.Announce and Client.Scrape buffer without limits, exhausting process memory.

The CAPTCHA implementation as used in (1) Francisco Burzi PHP-Nuke 7.0 and 8.1, (2) my123tkShop e-Commerce-Suite (aka 123tkShop) 0.9.1, (3) phpMyBitTorrent 1.2.2, (4) TorrentFlux 2.3, (5) e107 0.7.11, (6) WebZE 0.5.9, (7) Open Media Collectors Database (aka OpenDb) 1.5.0b4, and (8) Labgab 1.1 uses a code_bg.jpg background image and the PHP ImageString function in a way that produces an insufficient number of different images, which allows remote attackers to pass the CAPTCHA test via an automated attack using a table of all possible image checksums and their corresponding digit strings.

TorrentFlux 2.4 allows remote authenticated users to obtain other users' cookies via the cid parameter in an editCookies action to profile.php.

TorrentFlux 2.4 allows remote authenticated users to delete or modify other users' cookies via the cid parameter in an editCookies action to profile.php.

Multiple cross-site scripting (XSS) vulnerabilities in TorrentFlux 2.4 allow (1) remote attackers to inject arbitrary web script or HTML by leveraging failure to encode file contents when downloading a torrent file or (2) remote authenticated users to inject arbitrary web script or HTML via vectors involving a link to torrent details.