All vulnerabilities

Servers and applications

CVE-2023-38545

This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to pass along the host name to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that host name can be is 255 bytes. If the host name is detected to be longer, curl switches to local name resolving and instead passes on the resolved…

Severity
Critical 9.8
Published
18 Oct 2023
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.4.0
Sources
NVD

Affected software

SoftwareAffected versions
curlServers and applications · cpe:a:haxx:libcurl
  • From 7.69.0 before 8.4.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-38545
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-38545