CVE-2023-46724CWE-125CWE-1285CWE-129CWE-786CWE-823

SQUID-2023:4 Denial of Service in SSL Certificate validation

High · published November 1, 2023

CVSS v3.1
8.6
EPSS
4%
Percentile
90.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.04046 · 90.0th percentile
Weaknesses
CWE-125 · Out-of-bounds Read; CWE-1285 · Improper Validation of Specified Index, Position, or Offset in Input; CWE-129 · Improper Validation of Array Index; CWE-786 · Access of Memory Location Before Start of Buffer; CWE-823 · Use of Out-of-range Pointer Offset
Published
2023-11-01T19:09Z
EPSS history
Timeline
  • 01 NOV 19:09Z
    SQUID-2023:4 Denial of Service in SSL Certificate validation
    cvelistv5