Apache Tomcat up to 8.5.77/9.0.60/10.0.18/10.1.0-M12 Client Connection race condition

CVSS Meta Temp Score
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CTI Interest Score
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3.1$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Apache Tomcat up to 8.5.77/9.0.60/10.0.18/10.1.0-M12. The impacted element is an unknown function of the component Client Connection Handler. This manipulation causes race condition. The identification of this vulnerability is CVE-2021-43980. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache Tomcat up to 8.5.77/9.0.60/10.0.18/10.1.0-M12 (Application Server Software). It has been declared as problematic. Affected by this vulnerability is an unknown code of the component Client Connection Handler. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality. The summary by CVE is:

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

The weakness was shared 09/28/2022. The advisory is shared at lists.apache.org. This vulnerability is known as CVE-2021-43980 since 11/17/2021. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.2
VulDB Meta Temp Score: 3.1

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.7
NVD Vector: 🔍

CVSSv2info

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

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: 🔍

Timelineinfo

11/17/2021 🔍
09/28/2022 +314 days 🔍
09/28/2022 +0 days 🔍
10/24/2022 +26 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: lists.apache.org
Status: Confirmed

CVE: CVE-2021-43980 (🔍)
GCVE (CVE): GCVE-0-2021-43980
GCVE (VulDB): GCVE-100-209689

Entryinfo

Created: 09/28/2022 19:17
Updated: 10/24/2022 19:33
Changes: 09/28/2022 19:17 (40), 10/24/2022 19:33 (11)
Complete: 🔍
Cache ID: 216::103

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