CVE-2023-46724

2023-11-0120:15:08

CWE-823

CWE-786

CWE-295

CWE-1285

CWE-125

CWE-129

[email protected]

web.nvd.nist.gov

squid

caching proxy

denial of service

improper validation

ssl certificate

tls handshake

https

ssl-bump

cve-2023-46724

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.3 High

AI Score

Confidence

High

0.006 Low

EPSS

Percentile

78.7%

JSON

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.