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CVE-2023-46724

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Date: November 1, 2023

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 Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.

Language: C++

Severity Score

Related Resources (10)

https://security-tracker.debian.org/tracker/CVE-2023-46724
https://nvd.nist.gov/vuln/detail/CVE-2023-46724
https://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810
https://security.netapp.com/advisory/ntap-20231208-0001/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/
http://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch
https://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3
http://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch
https://www.mend.io/vulnerability-database/CVE-2023-46724

Severity Score

Weakness Type (CWE)

Improper Certificate Validation

CWE-295

Improper Validation of Array Index

CWE-129

Out-of-bounds Read

CWE-125

Access of Memory Location Before Start of Buffer

CWE-786

Use of Out-of-range Pointer Offset

CWE-823

Improper Validation of Specified Index, Position, or Offset in Input

CWE-1285

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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