UBUNTU-CVE-2021-43980

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Source

https://ubuntu.com/security/CVE-2021-43980

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43980.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-43980

Upstream

CVE-2021-43980

Published

2022-09-28T14:15:00Z

Modified

2025-10-24T04:50:37Z

Severity

3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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.

References

Affected packages

Ubuntu:16.04:LTS

tomcat6

Package

Name: tomcat6
Purl: pkg:deb/ubuntu/tomcat6@6.0.45+dfsg-1ubuntu0.2?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.0.41-4

6.0.45+dfsg-1

6.0.45+dfsg-1ubuntu0.1

6.0.45+dfsg-1ubuntu0.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "6.0.45+dfsg-1ubuntu0.2",
            "binary_name": "libservlet2.5-java"
        }
    ]
}

Ubuntu:Pro:14.04:LTS

tomcat6

Package

Name: tomcat6
Purl: pkg:deb/ubuntu/tomcat6@6.0.39-1ubuntu0.1+esm2?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.0.37-1

6.0.39-1

6.0.39-1ubuntu0.1

6.0.39-1ubuntu0.1+esm1

6.0.39-1ubuntu0.1+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "libservlet2.4-java"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "libservlet2.5-java"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "libtomcat6-java"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "tomcat6"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "tomcat6-admin"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "tomcat6-common"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "tomcat6-docs"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "tomcat6-examples"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "tomcat6-extras"
        },
        {
            "binary_version": "6.0.39-1ubuntu0.1+esm2",
            "binary_name": "tomcat6-user"
        }
    ]
}

tomcat7

Package

Name: tomcat7
Purl: pkg:deb/ubuntu/tomcat7@7.0.52-1ubuntu0.16+esm1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.0.42-1

7.0.47-1

7.0.50-1

7.0.52-1

7.0.52-1ubuntu0.1

7.0.52-1ubuntu0.3

7.0.52-1ubuntu0.6

7.0.52-1ubuntu0.7

7.0.52-1ubuntu0.8

7.0.52-1ubuntu0.9

7.0.52-1ubuntu0.10

7.0.52-1ubuntu0.11

7.0.52-1ubuntu0.13

7.0.52-1ubuntu0.14

7.0.52-1ubuntu0.15

7.0.52-1ubuntu0.16

7.0.52-1ubuntu0.16+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "libservlet3.0-java"
        },
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "libtomcat7-java"
        },
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "tomcat7"
        },
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "tomcat7-admin"
        },
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "tomcat7-common"
        },
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "tomcat7-docs"
        },
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "tomcat7-examples"
        },
        {
            "binary_version": "7.0.52-1ubuntu0.16+esm1",
            "binary_name": "tomcat7-user"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

tomcat8

Package

Name: tomcat8
Purl: pkg:deb/ubuntu/tomcat8@8.0.32-1ubuntu1.13+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

8.*

8.0.26-1

8.0.28-1

8.0.30-1

8.0.32-1

8.0.32-1ubuntu1

8.0.32-1ubuntu1.1

8.0.32-1ubuntu1.2

8.0.32-1ubuntu1.3

8.0.32-1ubuntu1.4

8.0.32-1ubuntu1.5

8.0.32-1ubuntu1.6

8.0.32-1ubuntu1.7

8.0.32-1ubuntu1.8

8.0.32-1ubuntu1.9

8.0.32-1ubuntu1.10

8.0.32-1ubuntu1.11

8.0.32-1ubuntu1.13

8.0.32-1ubuntu1.13+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "libservlet3.1-java"
        },
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "libtomcat8-java"
        },
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "tomcat8"
        },
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "tomcat8-admin"
        },
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "tomcat8-common"
        },
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "tomcat8-docs"
        },
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "tomcat8-examples"
        },
        {
            "binary_version": "8.0.32-1ubuntu1.13+esm1",
            "binary_name": "tomcat8-user"
        }
    ]
}

tomcat7

Package

Name: tomcat7
Purl: pkg:deb/ubuntu/tomcat7@7.0.68-1ubuntu0.4+esm3?arch=source&distro=esm-apps/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.0.64-1

7.0.68-1

7.0.68-1ubuntu0.1

7.0.68-1ubuntu0.3

7.0.68-1ubuntu0.4

7.0.68-1ubuntu0.4+esm1

7.0.68-1ubuntu0.4+esm2

7.0.68-1ubuntu0.4+esm3

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "libservlet3.0-java"
        },
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "libtomcat7-java"
        },
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "tomcat7"
        },
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "tomcat7-admin"
        },
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "tomcat7-common"
        },
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "tomcat7-docs"
        },
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "tomcat7-examples"
        },
        {
            "binary_version": "7.0.68-1ubuntu0.4+esm3",
            "binary_name": "tomcat7-user"
        }
    ]
}

Ubuntu:Pro:18.04:LTS

tomcat7

Package

Name: tomcat7
Purl: pkg:deb/ubuntu/tomcat7@7.0.78-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.0.78-1

7.0.78-1ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "7.0.78-1ubuntu0.1~esm1",
            "binary_name": "libservlet3.0-java"
        }
    ]
}

tomcat8

Package

Name: tomcat8
Purl: pkg:deb/ubuntu/tomcat8@8.5.39-1ubuntu1~18.04.3+esm5?arch=source&distro=esm-apps/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

8.*

8.5.21-1ubuntu1

8.5.29-1

8.5.30-1

8.5.30-1ubuntu1

8.5.30-1ubuntu1.2

8.5.30-1ubuntu1.3

8.5.30-1ubuntu1.4

8.5.39-1ubuntu1~18.04.1

8.5.39-1ubuntu1~18.04.2

8.5.39-1ubuntu1~18.04.3

8.5.39-1ubuntu1~18.04.3+esm1

8.5.39-1ubuntu1~18.04.3+esm2

8.5.39-1ubuntu1~18.04.3+esm3

8.5.39-1ubuntu1~18.04.3+esm4

8.5.39-1ubuntu1~18.04.3+esm5

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "libtomcat8-embed-java"
        },
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "libtomcat8-java"
        },
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "tomcat8"
        },
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "tomcat8-admin"
        },
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "tomcat8-common"
        },
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "tomcat8-docs"
        },
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "tomcat8-examples"
        },
        {
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm5",
            "binary_name": "tomcat8-user"
        }
    ]
}

tomcat9

Package

Name: tomcat9
Purl: pkg:deb/ubuntu/tomcat9@9.0.16-3ubuntu0.18.04.2+esm7?arch=source&distro=esm-apps/bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.0.16-3~18.04.1

9.0.16-3ubuntu0.18.04.1

9.0.16-3ubuntu0.18.04.2

9.0.16-3ubuntu0.18.04.2+esm1

9.0.16-3ubuntu0.18.04.2+esm2

9.0.16-3ubuntu0.18.04.2+esm3

9.0.16-3ubuntu0.18.04.2+esm4

9.0.16-3ubuntu0.18.04.2+esm5

9.0.16-3ubuntu0.18.04.2+esm6

9.0.16-3ubuntu0.18.04.2+esm7

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "libtomcat9-embed-java"
        },
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "libtomcat9-java"
        },
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "tomcat9"
        },
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "tomcat9-admin"
        },
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "tomcat9-common"
        },
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "tomcat9-docs"
        },
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "tomcat9-examples"
        },
        {
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm7",
            "binary_name": "tomcat9-user"
        }
    ]
}

Ubuntu:Pro:20.04:LTS

tomcat9

Package

Name: tomcat9
Purl: pkg:deb/ubuntu/tomcat9@9.0.31-1ubuntu0.9+esm2?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.0.24-1

9.0.27-1

9.0.31-1

9.0.31-1ubuntu0.1

9.0.31-1ubuntu0.2

9.0.31-1ubuntu0.3

9.0.31-1ubuntu0.4

9.0.31-1ubuntu0.5

9.0.31-1ubuntu0.6

9.0.31-1ubuntu0.7

9.0.31-1ubuntu0.8

9.0.31-1ubuntu0.9

9.0.31-1ubuntu0.9+esm1

9.0.31-1ubuntu0.9+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "libtomcat9-embed-java"
        },
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "libtomcat9-java"
        },
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "tomcat9"
        },
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "tomcat9-admin"
        },
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "tomcat9-common"
        },
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "tomcat9-docs"
        },
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "tomcat9-examples"
        },
        {
            "binary_version": "9.0.31-1ubuntu0.9+esm2",
            "binary_name": "tomcat9-user"
        }
    ]
}

Ubuntu:Pro:22.04:LTS

tomcat9

Package

Name: tomcat9
Purl: pkg:deb/ubuntu/tomcat9@9.0.58-1ubuntu0.2+esm3?arch=source&distro=esm-apps/jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

9.*

9.0.43-3

9.0.54-1

9.0.55-1

9.0.58-1

9.0.58-1ubuntu0.1

9.0.58-1ubuntu0.1+esm1

9.0.58-1ubuntu0.1+esm2

9.0.58-1ubuntu0.1+esm3

9.0.58-1ubuntu0.1+esm4

9.0.58-1ubuntu0.2

9.0.58-1ubuntu0.2+esm1

9.0.58-1ubuntu0.2+esm2

9.0.58-1ubuntu0.2+esm3

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "libtomcat9-embed-java"
        },
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "libtomcat9-java"
        },
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "tomcat9"
        },
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "tomcat9-admin"
        },
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "tomcat9-common"
        },
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "tomcat9-docs"
        },
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "tomcat9-examples"
        },
        {
            "binary_version": "9.0.58-1ubuntu0.2+esm3",
            "binary_name": "tomcat9-user"
        }
    ]
}