CVE-2019-6256

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
82%
KEV
Not listed

Published

January 14, 2019

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated May 28, 2026
Patch available.
generic

[SECURITY] [DSA 4408-1] liblivemedia security update

https://www.debian.org/security/2019/dsa-4408
generic

LIVE555 Media Server: Multiple vulnerabilities (GLSA 202005-06) — Gentoo security

https://security.gentoo.org/glsa/202005-06
generic

Bugtraq: [SECURITY] [DSA 4408-1] liblivemedia security update

https://seclists.org/bugtraq/2019/Mar/22
generic Patch Available

[SECURITY] [DLA 1690-1] liblivemedia security update

https://lists.debian.org/debian-lts-announce/2019/02/msg00037.html
generic Patch Available

There is a Denial of service attack issue that can cause program to crash in LIVE555 Media Server version 0.93. · Issue #19 · rgaufman/live555 · GitHub

https://github.com/rgaufman/live555/issues/19

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuliblivemedia50 (2016.02.09-1ubuntu0.1~esm1) @ xenial2026-05-27ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-26 14:51 UTCEPSS rescore
  2. 2026-07-25 14:14 UTCEPSS rescore
  3. 2026-07-24 14:14 UTCEPSS rescore
  4. 2026-07-23 14:15 UTCEPSS rescore
  5. 2026-07-23 01:46 UTCEG score recompute
  6. 2026-07-22 22:28 UTCEG score recompute
  7. 2026-07-22 14:05 UTCEPSS rescore
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  1. 2026-07-11 08:24 UTCEPSS rescore
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  3. 2026-07-09 19:06 UTCEPSS rescore
  4. 2026-07-08 15:11 UTCEPSS rescore
  5. 2026-07-07 13:43 UTCEPSS rescore
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  19. 2026-06-27 03:06 UTCEPSS rescore
  20. 2026-06-25 13:47 UTCEPSS rescore
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  22. 2026-06-24 14:03 UTCEPSS rescore
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  24. 2026-06-23 21:31 UTCEPSS rescore
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  26. 2026-06-22 14:23 UTCEPSS rescore
  27. 2026-06-22 14:23 UTCEPSS rescore
  28. 2026-06-21 14:54 UTCEPSS rescore
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  39. 2026-06-14 23:15 UTCEPSS rescore
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  41. 2026-06-13 22:58 UTCEPSS rescore
  42. 2026-06-12 23:09 UTCEPSS rescore
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  44. 2026-06-11 13:58 UTCEPSS rescore
  45. 2026-06-10 22:16 UTCEPSS rescore
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  47. 2026-06-10 13:19 UTCEPSS rescore
  48. 2026-06-08 14:15 UTCEPSS rescore
  49. 2026-06-08 14:15 UTCEPSS rescore
  50. 2026-06-08 14:15 UTCEPSS rescore
  51. 2026-06-07 15:23 UTCEPSS rescore
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  53. 2026-06-06 13:45 UTCEPSS rescore
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  67. 2026-05-29 13:42 UTCEPSS rescore
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  69. 2026-05-28 13:43 UTCEPSS rescore
  70. 2026-05-27 23:24 UTCEG score recompute
  71. 2026-05-27 23:24 UTCVendor advisory
  72. 2026-05-27 23:24 UTCGHSA enrichment
  73. 2026-05-27 13:39 UTCEPSS rescore
  74. 2026-05-27 13:38 UTCEPSS rescore
  75. 2026-05-26 13:42 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2019-6256?
CVE-2019-6256 is a critical vulnerability published on January 14, 2019. 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…
When was CVE-2019-6256 disclosed?
CVE-2019-6256 was first published in the National Vulnerability Database on January 14, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-6256 actively exploited?
CVE-2019-6256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 17.6% of all scored CVEs.
What is the CVSS score of CVE-2019-6256?
CVE-2019-6256 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-6256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-6256, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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