Asterisk prior 23.4.1 chan_ooh323 ooTrace stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k1.58+

Summaryinfo

A vulnerability identified as critical has been detected in Asterisk. Affected by this vulnerability is the function ooTrace of the component chan_ooh323. This manipulation causes stack-based overflow. This vulnerability is handled as CVE-2026-57201. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Asterisk. It has been declared as critical. Affected by this vulnerability is the function ooTrace of the component chan_ooh323. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect availability. The summary by CVE is:

Asterisk 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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-57201 since 06/24/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 20.20.1, 21.12.3, 22.10.1, 23.4.1, 20.7-cert11 or 22.8-cert3 eliminates this vulnerability.

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Productinfo

Type

Name

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Asterisk 20.20.1/21.12.3/22.10.1/23.4.1/20.7-cert11/22.8-cert3

Timelineinfo

06/24/2026 CVE reserved
10/27/2026 +125 days Advisory disclosed
10/27/2026 +0 days VulDB entry created
10/27/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-57201 (🔒)
GCVE (CVE): GCVE-0-2026-57201
GCVE (VulDB): GCVE-100-427471

Entryinfo

Created: 10/27/2026 18:08
Changes: 10/27/2026 18:08 (64)
Complete: 🔍
Cache ID: 216::103

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