ALASSQUID4-2023-004

References: CVE-2021-28116  CVE-2021-28651  CVE-2021-28652  CVE-2021-28662  CVE-2021-31806  CVE-2021-31807  CVE-2021-31808  CVE-2021-33620 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

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)

Issue Correction:
Run yum update squid to update your system.

New Packages:

aarch64:
    squid-4.15-1.amzn2.0.1.aarch64
    squid-debuginfo-4.15-1.amzn2.0.1.aarch64

i686:
    squid-4.15-1.amzn2.0.1.i686
    squid-debuginfo-4.15-1.amzn2.0.1.i686

src:
    squid-4.15-1.amzn2.0.1.src

x86_64:
    squid-4.15-1.amzn2.0.1.x86_64
    squid-debuginfo-4.15-1.amzn2.0.1.x86_64