جزئیات آسیب‌پذیری

Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory. The request body is read in a loop that asks sysread for all of the remaining declared length at once. Perl grows the read buffer to that size before any data arrives, so a length larger than available memory makes the worker exit with an uncatchable out of memory error before the application is called. A remote attacker can force a worker restart with each request of a few bytes.

• https://github.com/kazuho/Starlet/commit/598947ac620fd31b390335c683d79fa244770782.patch patch
• https://metacpan.org/release/KAZUHO/Starlet-0.33/changes release-notes