CVE-2023-32067: 0-byte UDP payload DoS in c-ares

Published May 24, 2023
·
Updated

0-byte UDP payload DoS in c-ares

Other sources

c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.

— Ubuntu

c-ares is vulnerable to a denial of service. By sending a specially crafted request, a remote attacker could exploit this vulnerability to cause a denial of service.

— IBM

CVE-2023-32067. 0-byte UDP payload causes Denial of Service (https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc)

— Red Hat

Affected Software

31 affected componentsFixes available
ubuntu/c-ares<1.14.0-1ubuntu0.2+
1.14.0-1ubuntu0.2+
ubuntu/c-ares<1.10.0-3ubuntu0.2+
1.10.0-3ubuntu0.2+
ubuntu/c-ares<1.19.1, <1.18.1-3
1.19.11.18.1-3
ubuntu/c-ares<1.15.0-1ubuntu0.3
1.15.0-1ubuntu0.3
ubuntu/c-ares<1.18.1-1ubuntu0.22.04.2
1.18.1-1ubuntu0.22.04.2
ubuntu/c-ares<1.18.1-1ubuntu0.22.10.2
1.18.1-1ubuntu0.22.10.2
ubuntu/c-ares<1.18.1-2ubuntu0.1
1.18.1-2ubuntu0.1
debian/c-ares<=1.14.0-1+deb10u1
1.14.0-1+deb10u41.17.1-1+deb11u31.18.1-31.26.0-1
IBM Cognos Analytics<=12.0.0-12.0.3
IBM Cognos Analytics<=11.2.0-11.2.4 FP4
C-ares Project C-ares<1.19.1
Fedoraproject Fedora=37
Fedoraproject Fedora=38
Debian Debian Linux=10.0
Debian Debian Linux=11.0
F5 BIG-IP>=17.5.0<=17.5.1, >=17.1.0<=17.1.3
17.5.1.117.1.3.1
F5 BIG-IP>=16.1.0<=16.1.6
F5 BIG-IP>=15.1.0<=15.1.10
F5 BIG-IP>=14.1.0<=14.1.5
F5 BIG-IP>=13.1.0<=13.1.5
F5 F5OS-A=1.5.0, =1.4.0, >=1.3.0<=1.3.2
1.5.1
F5 F5OS-C>=1.5.0<=1.5.1
Microsoft cbl2 fluent-bit 2.1.10-1
Patch available
Microsoft cbl2 nodejs18 18.17.1-2
Patch available
Microsoft cbl2 nodejs 16.20.1-2
Patch available
Microsoft cbl2 c-ares 1.19.1-1
Patch available
Microsoft azl3 grpc 1.42.0-7
Patch available
Microsoft cbl2 grpc 1.42.0-8
Patch available
Microsoft azl3 grpc 1.62.0-2
Patch available
Microsoft cbl2 python-gevent 21.1.2-3
Patch available
Microsoft cm1 c-ares 1.19.1-1
Patch available

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.14.0-1ubuntu0.2+
  2. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.10.0-3ubuntu0.2+
  3. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.19.1Fixed in 1.18.1-3
  4. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.15.0-1ubuntu0.3
  5. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.18.1-1ubuntu0.22.04.2
  6. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.18.1-1ubuntu0.22.10.2
  7. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.18.1-2ubuntu0.1
  8. Upgrade

    Upgrade debian/c-ares to a version that resolves this vulnerability.

    Fixed in 1.14.0-1+deb10u4Fixed in 1.17.1-1+deb11u3Fixed in 1.18.1-3Fixed in 1.26.0-1
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 17.5.1.117.1.3.1
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 1.5.1
  11. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.19.1
  12. Upgrade

    Upgrade ubuntu/c-ares to a version that resolves this vulnerability.

    Fixed in 1.18.1-3
  13. Upgrade

    Upgrade debian/c-ares to a version that resolves this vulnerability.

    Fixed in 1.14.0-1+deb10u4
  14. Upgrade

    Upgrade debian/c-ares to a version that resolves this vulnerability.

    Fixed in 1.17.1-1+deb11u3
  15. Upgrade

    Upgrade debian/c-ares to a version that resolves this vulnerability.

    Fixed in 1.18.1-3
  16. Upgrade

    Upgrade debian/c-ares to a version that resolves this vulnerability.

    Fixed in 1.26.0-1
  17. Upgrade

    Upgrade c-ares to a version that resolves this vulnerability.

    Fixed in 1.19.1
  18. Upgrade

    Upgrade IBM Cognos Analytics to a version that resolves this vulnerability.

    Fixed in 17.5.1.117.1.3.1

Event History

May 24, 2023
Data Sourced
via Red Hat·04:14 AM
DescriptionSeverityAffected Software
May 25, 2023
CVE Published
via Ubuntu·12:00 AM
CVE Published
via MITRE·10:49 PM
Data Sourced
via MITRE·10:49 PM
DescriptionSeverityWeakness
May 30, 2023
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·07:00 AM
Affected Software
Updated
via Microsoft·07:00 AM
DescriptionSeverity
Aug 11, 2023
Advisory Published
via F5·10:31 PM
Data Sourced
via F5·10:31 PM
DescriptionSeverityWeaknessAffected Software
Jan 12, 2024
Data Sourced
via Launchpad·12:20 AM
Description

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is CVE-2023-32067?

CVE-2023-32067 is a vulnerability in the c-ares asynchronous resolver library that allows an attacker to cause denial of service by sending a malformed UDP packet.

2

What is the severity of CVE-2023-32067?

CVE-2023-32067 has a severity rating of 7 (high).

3

How does CVE-2023-32067 affect c-ares?

CVE-2023-32067 affects c-ares versions up to 1.19.1.

4

How can I fix CVE-2023-32067?

To fix CVE-2023-32067, you should update c-ares to version 1.19.1 or higher.

5

Where can I find more information about CVE-2023-32067?

You can find more information about CVE-2023-32067 on the Red Hat security page, the c-ares GitHub security advisories page, and the Bugzilla page.

Company

Resources

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