Detections
Analytics
Amazon Linux 2 : squid (ALASSQUID4-2023-004)
medium Nessus Plugin ID 181987
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Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of squid installed on the remote host is prior to 4.15-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2SQUID4-2023-004 advisory.- Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody. (CVE-2021-28116)
- 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 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in benign network traffic. (CVE-2021-28662)
- 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. (CVE-2021-31808)
- Squid before 4.15 and 5.x before 5.0.6 allows 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. (CVE-2021-33620)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update squid' to update your system.See Also
https://alas.aws.amazon.com/AL2/ALASSQUID4-2023-004.html
https://alas.aws.amazon.com/cve/html/CVE-2021-28116.html
https://alas.aws.amazon.com/cve/html/CVE-2021-28651.html
https://alas.aws.amazon.com/cve/html/CVE-2021-28652.html
https://alas.aws.amazon.com/cve/html/CVE-2021-28662.html
https://alas.aws.amazon.com/cve/html/CVE-2021-31806.html
https://alas.aws.amazon.com/cve/html/CVE-2021-31807.html
https://alas.aws.amazon.com/cve/html/CVE-2021-31808.html
Plugin Details
Severity: Medium
ID: 181987
File Name: al2_ALASSQUID4-2023-004.nasl
Version: 1.3
Type: local
Agent: unix
Published: 9/27/2023
Updated: 12/22/2023
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.4
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2021-28116
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:squid, p-cpe:/a:amazon:linux:squid-debuginfo, cpe:/o:amazon:linux:2
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 8/21/2023
Vulnerability Publication Date: 3/9/2021
Reference Information
CVE: CVE-2021-28116, CVE-2021-28651, CVE-2021-28652, CVE-2021-28662, CVE-2021-31806, CVE-2021-31807, CVE-2021-31808, CVE-2021-33620