Allocation of Resources Without Limits or Throttling Affecting redis package, versions <6.0.14-6.8.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
1.15% (85th percentile)

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  • Snyk IDSNYK-SLES153-REDIS-2653606
  • published14 Apr 2022
  • disclosed23 Nov 2021

Introduced: 23 Nov 2021

CVE-2021-32675  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade SLES:15.3 redis to version 6.0.14-6.8.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream redis package and not the redis package as distributed by SLES. See How to fix? for SLES:15.3 relevant fixed versions and status.

Redis is an open source, in-memory database that persists on disk. When parsing an incoming Redis Standard Protocol (RESP) request, Redis allocates memory according to user-specified values which determine the number of elements (in the multi-bulk header) and size of each element (in the bulk header). An attacker delivering specially crafted requests over multiple connections can cause the server to allocate significant amount of memory. Because the same parsing mechanism is used to handle authentication requests, this vulnerability can also be exploited by unauthenticated users. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate this problem without patching the redis-server executable is to block access to prevent unauthenticated users from connecting to Redis. This can be done in different ways: Using network access control tools like firewalls, iptables, security groups, etc. or Enabling TLS and requiring users to authenticate using client side certificates.

CVSS Base Scores

version 3.1