UBUNTU-CVE-2023-43622

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Source
https://ubuntu.com/security/notices/UBUNTU-CVE-2023-43622
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-43622.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2023-43622
Related
Published
2023-10-23T07:15:00Z
Modified
2023-10-23T07:15:00Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.

References

Affected packages

Ubuntu:20.04:LTS / apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2@2.4.41-4ubuntu3.14?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.41-4ubuntu3.14

Affected versions

2.*

2.4.41-1ubuntu1
2.4.41-4ubuntu1
2.4.41-4ubuntu2
2.4.41-4ubuntu3
2.4.41-4ubuntu3.1
2.4.41-4ubuntu3.3
2.4.41-4ubuntu3.4
2.4.41-4ubuntu3.5
2.4.41-4ubuntu3.6
2.4.41-4ubuntu3.7
2.4.41-4ubuntu3.8
2.4.41-4ubuntu3.9
2.4.41-4ubuntu3.10
2.4.41-4ubuntu3.11
2.4.41-4ubuntu3.12
2.4.41-4ubuntu3.13

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "apache2-suexec-pristine-dbgsym": "2.4.41-4ubuntu3.14",
            "apache2-suexec-custom": "2.4.41-4ubuntu3.14",
            "apache2-dev": "2.4.41-4ubuntu3.14",
            "apache2-bin": "2.4.41-4ubuntu3.14",
            "apache2-suexec-pristine": "2.4.41-4ubuntu3.14",
            "apache2-doc": "2.4.41-4ubuntu3.14",
            "libapache2-mod-md": "2.4.41-4ubuntu3.14",
            "apache2": "2.4.41-4ubuntu3.14",
            "apache2-utils-dbgsym": "2.4.41-4ubuntu3.14",
            "apache2-data": "2.4.41-4ubuntu3.14",
            "libapache2-mod-proxy-uwsgi": "2.4.41-4ubuntu3.14",
            "apache2-suexec-custom-dbgsym": "2.4.41-4ubuntu3.14",
            "apache2-bin-dbgsym": "2.4.41-4ubuntu3.14",
            "apache2-utils": "2.4.41-4ubuntu3.14",
            "apache2-ssl-dev": "2.4.41-4ubuntu3.14"
        }
    ],
    "priority_reason": "Apache developers consider this to be a low-impact issue"
}

Ubuntu:22.04:LTS / apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2@2.4.52-1ubuntu4.6?arch=src?distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.52-1ubuntu4.6

Affected versions

2.*

2.4.48-3.1ubuntu3
2.4.48-3.1ubuntu4
2.4.51-2ubuntu1
2.4.52-1ubuntu1
2.4.52-1ubuntu2
2.4.52-1ubuntu4
2.4.52-1ubuntu4.1
2.4.52-1ubuntu4.2
2.4.52-1ubuntu4.3
2.4.52-1ubuntu4.4
2.4.52-1ubuntu4.5

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "apache2-suexec-pristine-dbgsym": "2.4.52-1ubuntu4.6",
            "apache2-suexec-custom": "2.4.52-1ubuntu4.6",
            "apache2-dev": "2.4.52-1ubuntu4.6",
            "apache2-bin": "2.4.52-1ubuntu4.6",
            "apache2-suexec-pristine": "2.4.52-1ubuntu4.6",
            "apache2-doc": "2.4.52-1ubuntu4.6",
            "libapache2-mod-md": "2.4.52-1ubuntu4.6",
            "apache2": "2.4.52-1ubuntu4.6",
            "apache2-utils-dbgsym": "2.4.52-1ubuntu4.6",
            "apache2-data": "2.4.52-1ubuntu4.6",
            "libapache2-mod-proxy-uwsgi": "2.4.52-1ubuntu4.6",
            "apache2-suexec-custom-dbgsym": "2.4.52-1ubuntu4.6",
            "apache2-bin-dbgsym": "2.4.52-1ubuntu4.6",
            "apache2-utils": "2.4.52-1ubuntu4.6",
            "apache2-ssl-dev": "2.4.52-1ubuntu4.6"
        }
    ],
    "priority_reason": "Apache developers consider this to be a low-impact issue"
}