CVE-2023-6193Medium· 5.3▾ SunlitUnbounded queuing of path validation messages in cloudflare-quiche
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.2 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.8%
quiche v. 0.15.0 through 0.19.0 was discovered to be vulnerable to unbounded queuing of path validation messages, which could lead to excessive resource consumption.
QUIC path validation (RFC 9000 Section 8.2) requires that the recipient of a PATH_CHALLENGE frame responds by sending a PATH_RESPONSE. An unauthenticated remote attacker can exploit the vulnerability by sending PATH_CHALLENGE frames and manipulating the connection (e.g. by restricting the peer's congestion window size) so that PATH_RESPONSE frames can only be sent at the slower rate than they are received, leading to storage of path validation data in an unbounded queue.
Quiche versions greater than 0.19.0 address this problem.
CVE-2023-6193 RFC 9000 Section 8.2
quiche >= 0.15.0, < 0.19.1Upgrade to a patched release:
quiche 0.19.1Connected by shared product, vendor, weakness, or advisory.
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