CVE-2020-13899Network attack vector

Unauthenticated stack-memory disclosure via uninitialized error buffer

Published Jun 10, 2020 · Updated Aug 4, 2024

Information disclosure in Janus WebRTC Server 0.9.0 through 0.10.0 allows remote attackers to read stack memory via crafted SDP. janus_process_incoming_request passes an uninitialized 512-byte error_str buffer to SDP preparsing and can return residual contents when parsing fails. No authentication or user interaction is required; exposure is limited to memory emitted in the SDP error response, with no reported data modification or service interruption.

CVSS severity7.5
High
EPSS probability2.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Janus WebRTC Server 0.9.0 through 0.10.0 allows remote attackers to read stack memory via crafted SDP. janus_process_incoming_request passes an uninitialized 512-byte error_str buffer to SDP preparsing and can return residual contents when parsing fails. No authentication or user interaction is required; exposure is limited to memory emitted in the SDP error response, with no reported data modification or service interruption.

The record

CVE
CVE-2020-13899
Published
Jun 10, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-908, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2020CVE 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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