Vulnerability in litespeedtech openlitespeed

[ Description ]Official description

OpenLiteSpeed through 1.9.4 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to evade virtual host client certificate requirements over HTTP/3. Because QuicStream inherits a verifyContext() implementation that always returns true, attackers can present a non-mTLS host's SNI with a protected Host header to access protected content.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• abraxaslabs.tech/research/openlitespeed-h3-mtls-verifycontext
• github.com/litespeedtech/openlitespeed
• github.com/litespeedtech/openlitespeed/blob/v1.9.4/src/http/httpsession.cpp
• github.com/litespeedtech/openlitespeed/blob/v1.9.4/src/quic/quicstream.h
• github.com/litespeedtech/openlitespeed/blob/v1.9.4/src/sslpp/hiocrypto.h
• www.vulncheck.com/advisories/openlitespeed-through-1.9.4-mtls-bypass-via-http-3-sni-and…