CVE-2026-56123: socat, грешка в паметта

Описание

Оригинално описание

socat versions 1.8.0.0 through 1.8.1.1 contain a heap-based buffer overflow vulnerability that allows a malicious SOCKS5 proxy server to overwrite adjacent heap memory by exploiting a sign-extension flaw in the DOMAINNAME reply parser. During connection setup, the domain name length byte is read through a signed char field causing a negative bytes_to_read value that is implicitly converted to size_t, resulting in an unbounded heap write into the 262-byte reply buffer with attacker-controlled size and content.

Засегнати продукти

• socat socat: 1.8.0.0 преди 1.8.1.2

Вид слабост

• CWE-122 Препълване на буфера в хийпа

История

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-56123
• https://nvd.nist.gov/vuln/detail/CVE-2026-56123
• http://www.dest-unreach.org/socat/CHANGES
• https://www.vulncheck.com/advisories/socat-heap-buffer-overflow-via-socks5-reply-parser