Asterisk: Stack Buffer Overflow in H.323 ooTrace() via Unbounded vsprintf into Fixed 2048-byte Buffer

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57201
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 17:17:02 UTC
Updated2026-10-30 21:17:12 UTC
DescriptionAsterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, a stack buffer overflow in the H.323 `ooTrace()` trace-logging function can occur when unbounded `vsprintf` writes into a fixed `2048-byte buffer`. A remote attacker may send a carefully crafted packet that causes the Asterisk process to crash. The `chan_ooh323` addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.007000000 probability, percentile 0.531820000 (date 2026-11-02)

Problem Types: CWE-787 | CWE-787 CWE-787: Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Asterisk Asterisk affected < 20.20.1 Not specified
CNA Asterisk Asterisk affected >= 21.0.0-pre1, < 21.12.3 Not specified
CNA Asterisk Asterisk affected >= 22.0.0-pre1, < 22.10.1 Not specified
CNA Asterisk Asterisk affected >= 23.0.0-pre1, < 23.4.1 Not specified
CNA Asterisk Certified-asterisk affected < 20.7-cert11 Not specified
CNA Asterisk Certified-asterisk affected >= 22.8-cert1-pre1, < 22.8-cert3 Not specified

References

ReferenceSourceLinkTags
github.com/asterisk/asterisk/commit/875ac7413de0b7068cd12d0da2f140cd06ba... [email protected] github.com
github.com/asterisk/asterisk/releases/tag/22.10.1 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/20.20.1 [email protected] github.com
github.com/asterisk/asterisk/commit/bf0c9a906892bc0f91fa753476e326919e4e... [email protected] github.com
github.com/asterisk/asterisk/commit/c4d9b4defe83f74523880fd630c02c496837... [email protected] github.com
github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 [email protected] github.com
github.com/asterisk/asterisk/commit/2d7b8c8dc13d9ead8b6f36cc38b6dd91cd4a... [email protected] github.com
github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 [email protected] github.com
github.com/asterisk/asterisk/commit/fff256d0539e96f70ac315844d72e9d540f0... [email protected] github.com
github.com/asterisk/asterisk/commit/33f62e351642edd9c58ef97b000213272254... [email protected] github.com
github.com/asterisk/asterisk/security/advisories/GHSA-x348-j6c9-77f3 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/23.4.1 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/21.12.3 [email protected] github.com
github.com/asterisk/asterisk/commit/ac0a64dec6d4231bf005a68da6af3e02bb31... [email protected] github.com
github.com/asterisk/asterisk/tree/24.0.0-pre1 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report