CVE-2023-38545 (libcurl)

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 address only. Due to this …

address buffer curl cve cve-2023-38545 flaw handshake host length libcurl name overflow pass proxy socks5 socks5 proxy