QID 354783

an issue was discovered in squid before 4.15 and 5.x before 5.0.6.
Due to a buffer-management bug, it allows a denial of service.
When resolving a request with the urn: scheme, the parser leaks a small amount of memory.
However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption. (
( CVE-2021-28651) an issue was discovered in squid before 4.15 and 5.x before 5.0.6.
Due to incorrect parser validation, it allows a denial of service attack against the cache manager api.
This allows a trusted client to trigger memory leaks that.
Over time, lead to a denial of service via an unspecified short query string.
This attack is limited to clients with cache manager api access privilege. (
( CVE-2021-28652) an issue was discovered in squid before 4.15 and 5.x before 5.0.6.
Due to a memory-management bug, it is vulnerable to a denial of service attack (against all clients using the proxy) via http range request processing. (
( CVE-2021-31806) an issue was discovered in squid before 4.15 and 5.x before 5.0.6.
An integer overflow problem allows a remote server to achieve denial of service when delivering responses to http range requests.
The issue trigger is a header that can be expected to exist in http traffic without any malicious intent. (
( CVE-2021-31807) an issue was discovered in squid before 4.15 and 5.x before 5.0.6.
Due to an input-validation bug, it is vulnerable to a denial of service attack (against all clients using the proxy).
A client sends an http range request to trigger this. (
The issue trigger is a header that can be expected to exist in http traffic without any malicious intent by the server. (

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.