FreeSWITCH: Pre-authentication heap out-of-bounds write in mod_xml_rpc WebSocket frame length handling

Özet

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FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to 1.11.2, ws_read_frame() decoded a WebSocket frame's 64-bit extended payload length with a 32-bit byte swap and narrowed the result into a signed length. A value whose surviving low word became negative bypassed the signed size check and was reinterpreted as an enormous unsigned count, causing client bytes to overwrite memory beyond the 64 KiB receive buffer. Any client completing a /socket WebSocket upgrade on an enabled mod_xml_rpc endpoint reached the parser before HTTP authentication; both the module and WebSocket endpoint are disabled by default. The heap overwrite can corrupt connection pointers and crash FreeSWITCH, ending every concurrent session, although remote code execution has not been demonstrated. This issue is fixed in version 1.11.2.

Etkilenen sürümler1 yazılım

Kaynaklar5 kaynak

• CVE.org kaydı
• NVD kaydı
• github.com/…switch/security/advisories/GHSA-jj89-q47c-gh94 Diğer
• github.com/…ommit/d557ca6d29e6da4f10824dc158100906a592b91a Diğer
• github.com/signalwire/freeswitch/releases/tag/v1.11.2 Diğer

Kayıt geçmişi

1. 5 Kas 2026 22:26Yayımlandı

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