PJSIP up to 2.11.0 SSL Socket race condition

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in PJSIP up to 2.11.0. It has been declared as problematic. This issue affects some unknown processing of the component SSL Socket Handler. Such manipulation leads to race condition. This vulnerability is uniquely identified as CVE-2021-32686. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in PJSIP up to 2.11.0. It has been rated as problematic. Affected by this issue is some unknown processing of the component SSL Socket Handler. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is availability.

The weakness was disclosed 07/24/2021. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-32686. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.11.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CNA Base Score: 5.9
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

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: PJSIP 2.11.1
Patch: github.com

Timelineinfo

05/12/2021 🔍
07/24/2021 +73 days 🔍
07/24/2021 +0 days 🔍
11/04/2025 +1564 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-32686 (🔍)
GCVE (CVE): GCVE-0-2021-32686
GCVE (VulDB): GCVE-100-179612

Entryinfo

Created: 07/24/2021 08:32
Updated: 11/04/2025 18:00
Changes: 07/24/2021 08:32 (39), 07/28/2021 14:24 (3), 07/28/2021 14:25 (1), 11/04/2025 18:00 (42)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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