Debian LTS: Security Advisory for squid3 (DLA-2685-1)

Published: 2021-06-15 03:00:11
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Summary:
The remote host is missing an update for the 'squid3' Linux Distribution Package(s) announced via the DLA-2685-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
Several vulnerabilities were discovered in Squid, a proxy caching server. CVE-2021-28651 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-2021-28652 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-2021-31806 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-2021-31807 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-2021-31808 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. CVE-2021-33620 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.

Affected Versions:
'squid3' Linux Distribution Package(s) on Debian Linux.

Recommendations:
For Debian 9 stretch, these problems have been fixed in version 3.5.23-5+deb9u7. We recommend that you upgrade your squid3 Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2021-28651
https://nvd.nist.gov/vuln/detail/CVE-2021-28652
https://nvd.nist.gov/vuln/detail/CVE-2021-31806
https://nvd.nist.gov/vuln/detail/CVE-2021-31807
https://nvd.nist.gov/vuln/detail/CVE-2021-31808
https://nvd.nist.gov/vuln/detail/CVE-2021-33620

References:

https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
https://security-tracker.debian.org/tracker/DLA-2685-1

Severity
Medium
CVSS Score
5.0
Published
2021-06-15
Modified
2021-06-15
Category
Debian Local Security Checks

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