CVE-2023-46724

Summary

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.

Affected Software

VendorProductVersion RangeStatus
squid-cachesquid>= 3.3.0.1, < 6.4affected

Weaknesses

  • CWE-125: CWE-125: Out-of-bounds Read
  • CWE-129: CWE-129: Improper Validation of Array Index
  • CWE-786: CWE-786: Access of Memory Location Before Start of Buffer
  • CWE-823: CWE-823: Use of Out-of-range Pointer Offset
  • CWE-1285: CWE-1285: Improper Validation of Specified Index, Position, or Offset in Input

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References