CVE-2021-43980
Apache Tomcat: Information disclosure
Severity Score
3.7
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Una implementación simplificada de lecturas y escrituras de bloqueo introducida en Tomcat versión 10 y retrocedida a Tomcat versión 9.0.47 en adelante expuso un error de concurrencia de larga data (pero extremadamente difícil de activar) en Apache Tomcat versiones 10.1.0 a 10. 1.0-M12, 10.0.0-M1 a 10.0.18, 9.0.0-M1 a 9.0.60 y 8.5.0 a 8.5.77, que podía causar que las conexiones de los clientes compartieran una instancia de Http11Processor resultando en que las respuestas, o parte de ellas, fueran recibidas por el cliente equivocado
*Credits:
Thanks to Adam Thomas, Richard Hernandez and Ryan Schmitt for discovering the issue and working with the Tomcat security team to identify the root cause and appropriate fix.
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-11-17 CVE Reserved
- 2022-09-28 CVE Published
- 2024-04-20 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2022/09/28/1 | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2022/10/msg00029.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://lists.apache.org/thread/3jjqbsp6j88b198x5rmg99b1qr8ht3g3 | 2022-11-10 | |
| https://www.debian.org/security/2022/dsa-5265 | 2022-11-10 | |
| https://access.redhat.com/security/cve/CVE-2021-43980 | 2022-11-02 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2130599 | 2022-11-02 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | >= 8.5.0 <= 8.5.77 Search vendor "Apache" for product "Tomcat" and version " >= 8.5.0 <= 8.5.77" | - |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | >= 9.0.0 <= 9.0.60 Search vendor "Apache" for product "Tomcat" and version " >= 9.0.0 <= 9.0.60" | - |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | >= 10.0.0 <= 10.0.18 Search vendor "Apache" for product "Tomcat" and version " >= 10.0.0 <= 10.0.18" | - |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone1 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone10 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone11 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone12 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone2 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone3 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone4 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone5 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone6 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone7 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone8 |
Affected
| ||||||
| Apache Search vendor "Apache" | Tomcat Search vendor "Apache" for product "Tomcat" | 10.1.0 Search vendor "Apache" for product "Tomcat" and version "10.1.0" | milestone9 |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
| ||||||