CVE-2020-24027Public exploitNetwork attack vector

Remote memory corruption via unbounded Range formatting

Published Jan 11, 2021 · Updated Aug 4, 2024

Stack buffer overflow in liblivemedia 20200625 allows remote attackers to corrupt server memory through an absolute-time RTSP PLAY request. RTSPServer::RTSPClientSession::handleCmd_PLAY passes attacker-controlled clock values to sprintf, which writes a Range header into a 100-byte stack buffer without a length bound. An unauthenticated network path to the RTSP service and an established media session expose the process to a crash or remote code execution.

CVSS severity9.8
Critical
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in liblivemedia 20200625 allows remote attackers to corrupt server memory through an absolute-time RTSP PLAY request. RTSPServer::RTSPClientSession::handleCmd_PLAY passes attacker-controlled clock values to sprintf, which writes a Range header into a 100-byte stack buffer without a length bound. An unauthenticated network path to the RTSP service and an established media session expose the process to a crash or remote code execution.

The record

CVE
CVE-2020-24027
Published
Jan 11, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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