CVE-2021-32628

 

Published at: - 04-10-2021 08:15

Last modified: - 02-07-2022 10:06

Total changes: - 8

Description

Redis is an open source, in-memory database that persists on disk. An integer overflow bug in the ziplist data structure used by all versions of Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves modifying the default ziplist configuration parameters (hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries or zset-max-ziplist-value) to a very large value, and then constructing specially crafted commands to create very large ziplists. The problem is fixed in Redis versions 6.2.6, 6.0.16, 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the above configuration parameters. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://github.com/redis/redis/commit/f6a40570fa63d5afdd596c78083d754081d80ae3
• https://github.com/redis/redis/security/advisories/GHSA-vw22-qm3h-49pr
• FEDORA-2021-8913c7900c-Mailing List, Third Party Advisory
• FEDORA-2021-61c487f241-Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211104-0003/
• FEDORA-2021-aa94492a09-Mailing List, Third Party Advisory
• DSA-5001-Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.html

 

Keywords

NVD

 

CVE-2021-32628

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures