What’s Vulnerable › Vulnerabilities

CVE-2019-6256

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-01-14 · updated 2026-06-17
• Weakness: CWE-755

Description

A Denial of Service issue was discovered in the LIVE555 Streaming Media libraries as used in Live555 Media Server 0.93. It can cause an RTSPServer crash in handleHTTPCmd_TunnelingPOST, when RTSP-over-HTTP tunneling is supported, via x-sessioncookie HTTP headers in a GET request and a POST request within the same TCP session. This occurs because of a call to an incorrect virtual function pointer in the readSocket function in GroupsockHelper.cpp.

Affected products

• Debian Linux: 8.0, 9.0
• Live555 Media Server: 0.93

References

• https://github.com/rgaufman/live555/issues/19
• https://lists.debian.org/debian-lts-announce/2019/02/msg00037.html
• https://seclists.org/bugtraq/2019/Mar/22
• https://security.gentoo.org/glsa/202005-06
• https://www.debian.org/security/2019/dsa-4408
• https://github.com/rgaufman/live555/issues/19
• https://lists.debian.org/debian-lts-announce/2019/02/msg00037.html
• https://seclists.org/bugtraq/2019/Mar/22
• https://security.gentoo.org/glsa/202005-06
• https://www.debian.org/security/2019/dsa-4408

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