CVE-2021-32761

 

Published at: - 21-07-2021 11:15

Last modified: - 02-07-2022 08:33

Total changes: - 11

Description

Redis is an in-memory database that persists on disk. A vulnerability involving out-of-bounds read and integer overflow to buffer overflow exists starting with version 2.2 and prior to versions 5.0.13, 6.0.15, and 6.2.5. On 32-bit systems, Redis `*BIT*` command are vulnerable to integer overflow that can potentially be exploited to corrupt the heap, leak arbitrary heap contents or trigger remote code execution. The vulnerability involves changing the default `proto-max-bulk-len` configuration parameter to a very large value and constructing specially crafted commands bit commands. This problem only affects Redis on 32-bit platforms, or compiled as a 32-bit binary. Redis versions 5.0.`3m 6.0.15, and 6.2.5 contain patches for this issue. An additional workaround to mitigate the problem without patching the `redis-server` executable is to prevent users from modifying the `proto-max-bulk-len` configuration parameter. 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/security/advisories/GHSA-8wxq-j7rp-g8wj
• [debian-lts-announce] 20210722 [SECURITY] [DLA 2717-1] redis security update-Mailing List, Third Party Advisory
• FEDORA-2021-76cf1653b3-Mailing List, Third Party Advisory
• FEDORA-2021-10d54c261f-Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210827-0004/
• [debian-lts-announce] 20210827 [SECURITY] [DLA 2717-2] redis security update-Mailing List, Third Party Advisory
• DSA-5001-Third Party Advisory

 

Keywords

NVD

 

CVE-2021-32761

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures