The vulnerability of the ESIExpression::Evaluate function in the Squid proxy server lies in the fact that it allows the output of operations within acceptable data buffer limits. This enables attackers to access confidential data, compromise its integrity, and cause service failures.

The vulnerability of the ESIExpression::Evaluate function of the Squid proxy server is related to the execution of operations within acceptable data buffer limits. Exploiting this vulnerability can allow a remote attacker to access confidential data, compromise its integrity, and cause service...

OESA-2021-1020 squid security update

Squid is a high-performance proxy caching server. It handles all requests in a single, non-blocking, I/O-driven process and keeps meta data and implements negative caching of failed requests.\r\n\r\n Security Fixes:\r\n\r\n An issue was discovered in Squid through 4.7. When handling the tag...

DEBIAN-CVE-2019-12519

An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the...