CVE-2023-28856: `HINCRBYFLOAT` can be used to crash a redis-server process

Published Apr 17, 2023
·
Updated

A vulnerability was found in Redis. This flaw allows authenticated users to use the HINCRBYFLOAT command to create an invalid hash field that may crash Redis on access.

Other sources

CVE-2023-28856:

- The vulnerability allows a remote user to perform a denial of service (DoS) attack. - The vulnerability exists due to insufficient validation of user-supplied input. A remote user can use the HINCRBYFLOAT command to create an invalid hash field that will crash Redis on access.

Vulnerable software versions:

Redis: 7.0.0 - 7.0.10, 6.2.0 - 6.2.11, 6.0.0 - 6.0.18

References:

https://github.com/redis/redis/releases/tag/7.0.11

— Red Hat

Redis is an open source, in-memory database that persists on disk. Authenticated users can use the HINCRBYFLOAT command to create an invalid hash field that will crash Redis on access in affected versions. This issue has been addressed in in versions 7.0.11, 6.2.12, and 6.0.19. Users are advised to upgrade. There are no known workarounds for this issue.

— Ubuntu

Redis is vulnerable to a denial of service, caused by improper input validation. By sending a specially crafted HINCRBYFLOAT command, a local authenticated attacker could exploit this vulnerability to cause the redis-server process to crash.

— IBM

Affected Software

18 affected componentsFixes available
debian/redis<=5:5.0.14-1+deb10u2, <=5:6.0.16-1+deb11u2
5:5.0.14-1+deb10u55:7.0.15-1~deb12u15:7.0.15-1
ubuntu/redis<5:4.0.9-1ubuntu0.2+
5:4.0.9-1ubuntu0.2+
ubuntu/redis<5:5.0.7-2ubuntu0.1+
5:5.0.7-2ubuntu0.1+
ubuntu/redis<5:6.0.16-1ubuntu1+
5:6.0.16-1ubuntu1+
ubuntu/redis<2:2.8.4-2ubuntu0.2+
2:2.8.4-2ubuntu0.2+
ubuntu/redis<5:7.0.11-1
5:7.0.11-1
ubuntu/redis<2:3.0.6-1ubuntu0.4+
2:3.0.6-1ubuntu0.4+
redhat/redis<7.0.11
7.0.11
redhat/redis<6.2.12
6.2.12
redhat/redis<6.0.19
6.0.19
IBM Planning Analytics<=2.0
Redis redis<6.0.19
Redis redis>=6.2.0<6.2.12
Redis redis>=7.0.0<7.0.11
Debian Debian Linux=10.0
Fedoraproject Fedora=36
Fedoraproject Fedora=37
Fedoraproject Fedora=38

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/redis to a version that resolves this vulnerability.

    Fixed in 5:5.0.14-1+deb10u5Fixed in 5:7.0.15-1~deb12u1Fixed in 5:7.0.15-1
  2. Upgrade

    Upgrade ubuntu/redis to a version that resolves this vulnerability.

    Fixed in 5:4.0.9-1ubuntu0.2+
  3. Upgrade

    Upgrade ubuntu/redis to a version that resolves this vulnerability.

    Fixed in 5:5.0.7-2ubuntu0.1+
  4. Upgrade

    Upgrade ubuntu/redis to a version that resolves this vulnerability.

    Fixed in 5:6.0.16-1ubuntu1+
  5. Upgrade

    Upgrade ubuntu/redis to a version that resolves this vulnerability.

    Fixed in 2:2.8.4-2ubuntu0.2+
  6. Upgrade

    Upgrade ubuntu/redis to a version that resolves this vulnerability.

    Fixed in 5:7.0.11-1
  7. Upgrade

    Upgrade ubuntu/redis to a version that resolves this vulnerability.

    Fixed in 2:3.0.6-1ubuntu0.4+
  8. Upgrade

    Upgrade redhat/redis to a version that resolves this vulnerability.

    Fixed in 7.0.11
  9. Upgrade

    Upgrade redhat/redis to a version that resolves this vulnerability.

    Fixed in 6.2.12
  10. Upgrade

    Upgrade redhat/redis to a version that resolves this vulnerability.

    Fixed in 6.0.19
  11. Upgrade

    Upgrade redis to a version that resolves this vulnerability.

    Fixed in 7.0.11
  12. Upgrade

    Upgrade redis to a version that resolves this vulnerability.

    Fixed in 6.2.12
  13. Upgrade

    Upgrade redis to a version that resolves this vulnerability.

    Fixed in 6.0.19
  14. Compensating control

    No known workarounds are available for this issue; mitigate exposure by ensuring only trusted/authorized clients can authenticate and access Redis commands (especially HINCRBYFLOAT).

Event History

Apr 17, 2023
CVE Published
12:00 AM
Data Sourced
12:00 AM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·08:02 PM
DescriptionSeverityAffected Software
Apr 18, 2023
CVE Published
via MITRE·08:50 PM
Data Sourced
via MITRE·08:50 PM
DescriptionSeverityWeakness
Jan 12, 2024
Data Sourced
via Launchpad·12:18 AM
Description

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is CVE-2023-28856?

CVE-2023-28856 is a vulnerability found in Redis that allows authenticated users to use the HINCRBYFLOAT command to create an invalid hash field that will crash Redis on access.

2

What is the severity of CVE-2023-28856?

CVE-2023-28856 has a severity rating of 6.5, which is classified as medium.

3

How can I exploit the CVE-2023-28856 vulnerability?

To exploit CVE-2023-28856, an attacker needs to be an authenticated user and use the HINCRBYFLOAT command to create an invalid hash field that will crash Redis on access.

4

How can I fix CVE-2023-28856?

To fix CVE-2023-28856, update Redis to version 7.0.11, 6.2.12, or 6.0.19.

5

Where can I find more information about CVE-2023-28856?

You can find more information about CVE-2023-28856 in the reference links: https://github.com/redis/redis/releases/tag/7.0.11, https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2187526, https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2187527

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