Debian Security Advisory
DLA-2685-1 squid3 -- LTS security update
- Date Reported:
- 28 Jun 2021
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2021-28651, CVE-2021-28652, CVE-2021-31806, CVE-2021-31807, CVE-2021-31808, CVE-2021-33620.
- More information:
Several vulnerabilities were discovered in Squid, a proxy caching server.
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.
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.
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.
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.
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.
Remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.
For Debian 9 stretch, these problems have been fixed in version 3.5.23-5+deb9u7.
We recommend that you upgrade your squid3 packages.
For the detailed security status of squid3 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/squid3
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS