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    2 vulnerabilities by baresip

    CVE-2026-50161 (GCVE-0-2026-50161)

    Vulnerability from nvd – Published: 2026-08-18 17:53 – Updated: 2026-08-19 15:11
    VLAI
    Title
    libre: Integer overflow in websock_decode() masked frame length check leads to heap buffer overflow
    Summary
    libre is a generic library for real-time communications with asynchronous input and output support. Prior to 4.8.1, the websock_decode() function in src/websock/websock.c contains an integer overflow when validating a masked WebSocket frame that uses the 64-bit extended length encoding. The expression 4 + hdr->len can wrap when hdr->len is close to UINT64_MAX, causing the mbuf_get_left() bounds check to pass. The subsequent XOR unmasking loop then writes beyond the heap buffer. Applications using websock_accept() or websock_accept_proto() to implement a WebSocket server are affected, and exploitation can cause attacker-controlled heap corruption or denial of service after the HTTP WebSocket upgrade handshake. This issue is fixed in version 4.8.1.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-19 15:11 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    • CWE-787 - Out-of-bounds Write
    Assigner
    References
    Impacted products
    Vendor Product Version
    baresip re Affected: < 4.8.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-50161 (GCVE-0-2026-50161)

    Vulnerability from cvelistv5 – Published: 2026-08-18 17:53 – Updated: 2026-08-19 15:11
    VLAI
    Title
    libre: Integer overflow in websock_decode() masked frame length check leads to heap buffer overflow
    Summary
    libre is a generic library for real-time communications with asynchronous input and output support. Prior to 4.8.1, the websock_decode() function in src/websock/websock.c contains an integer overflow when validating a masked WebSocket frame that uses the 64-bit extended length encoding. The expression 4 + hdr->len can wrap when hdr->len is close to UINT64_MAX, causing the mbuf_get_left() bounds check to pass. The subsequent XOR unmasking loop then writes beyond the heap buffer. Applications using websock_accept() or websock_accept_proto() to implement a WebSocket server are affected, and exploitation can cause attacker-controlled heap corruption or denial of service after the HTTP WebSocket upgrade handshake. This issue is fixed in version 4.8.1.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-19 15:11 UTC
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    • CWE-787 - Out-of-bounds Write
    Assigner
    References
    Impacted products
    Vendor Product Version
    baresip re Affected: < 4.8.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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