CVE-2021-43980
Published: 28 September 2022
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.
Priority
Status
Package | Release | Status |
---|---|---|
tomcat9 Launchpad, Ubuntu, Debian |
lunar |
Needs triage
|
xenial |
Does not exist
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
trusty |
Does not exist
|
|
jammy |
Needs triage
|
|
upstream |
Needs triage
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
mantic |
Needs triage
|
|
tomcat6 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
trusty |
Needs triage
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
tomcat7 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
trusty |
Needs triage
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
tomcat8 Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
xenial |
Needs triage
|
|
bionic |
Needs triage
|
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
upstream |
Needs triage
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 3.7 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | Low |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43980
- https://lists.apache.org/thread/3jjqbsp6j88b198x5rmg99b1qr8ht3g3
- https://github.com/apache/tomcat/commit/170e0f792bd18ff031677890ba2fe50eb7a376c1 (9.0.61)
- https://github.com/apache/tomcat/commit/4a00b0c0890538b9d3107eef8f2e0afadd119beb (8.5.78)
- http://www.openwall.com/lists/oss-security/2022/09/28/1
- NVD
- Launchpad
- Debian