Rapid7 Vulnerability & Exploit Database

Ubuntu: USN-5221-1 (CVE-2021-41099): Redis vulnerabilities

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

Ubuntu: USN-5221-1 (CVE-2021-41099): Redis vulnerabilities

Severity
6
CVSS
(AV:N/AC:M/Au:S/C:P/I:P/A:P)
Published
10/04/2021
Created
03/29/2023
Added
03/22/2023
Modified
05/01/2023

Description

Redis is an open source, in-memory database that persists on disk. An integer overflow bug in the underlying string library can be used to corrupt the heap and potentially result with denial of service or remote code execution. The vulnerability involves changing the default proto-max-bulk-len configuration parameter to a very large value and constructing specially crafted network payloads or commands. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. 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.

Solution(s)

  • ubuntu-upgrade-redis
  • ubuntu-upgrade-redis-server
  • ubuntu-upgrade-redis-tools

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;