Out-of-bounds Read in Squid-Cache Squid
CVE-2023-46724
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.
Vulnerability class: Buffer Overflow
EPSS: 0.040 (89.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Squid-cache Squid — versions >= 3.3.0.1, < 6.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, Mailing List, x_refsource_MISC)
- security-advisories@github.com (Patch, Mailing List, x_refsource_MISC)
- security-advisories@github.com
- security-advisories@github.com
- security-advisories@github.com
Frequently asked questions
- What is CVE-2023-46724?
- CVE-2023-46724 is a high-severity vulnerability in Squid-Cache Squid, classified under Out-of-bounds Read. CVSS score: 8.6/10. Published 2023-11-01.
- How severe is CVE-2023-46724?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2023-46724 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.