QID 356900

Date Published: 2024-01-16

QID 356900: Amazon Linux Security Advisory for squid : ALAS2023-2023-429

2023-12-06:( CVE-2023-46728 was added to this advisory. squid is a caching proxy for the web.
Due to an improper validation of specified index bug, squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a denial of service attack against ssl certificate validation.
This problem allows a remote server to perform denial of service against squid proxy by initiating a tls handshake with a specially crafted ssl certificate in a server certificate chain.
This attack is limited to https and ssl-bump.
This bug is fixed in squid version 6.4.
In addition, patches addressing this problem for the stable releases can be found in squids patch archives.
Those who you use a prepackaged version of squid should refer to the package vendor for availability information on updated packages. (
( CVE-2023-46724) squid is a caching proxy for the web supporting http, https, ftp, and more.
Due to a null pointer dereference bug squid is vulnerable to a denial of service attack against squids gopher gateway.
The gopher protocol is always available and enabled in squid prior to squid 6.0.1.
Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent.
Gopher support has been removed in squid version 6.0.1.
Users are advised to upgrade.
Users unable to upgrade should reject all gopher url requests. (
( CVE-2023-46728) due to chunked decoder lenience squid is vulnerable to request/response smuggling attacks when parsing http/1.1 and icap messages. (
( CVE-2023-46848)

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

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as Medium - 5.4 severity.

Solution

Please refer to Amazon advisory: ALAS2023-2023-429 for affected packages and patching details, or update with your package manager.

Vendor References

ALAS2023-2023-429 - alas.aws.amazon.com/AL2023/ALAS-2023-429.html

CVEs related to QID 356900

CVE-2023-46728 | CVE-2023-46848 | CVE-2023-46724 | CVE-2023-46846 |

Software Advisories

Advisory ID	Software	Component	Link
ALAS2023-2023-429	amazon linux 2023		alas.aws.amazon.com/AL2023/ALAS-2023-429.html

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