THREATPORT/VULNERABILITY/CVE-2021-32687
HIGH SEVERITY

CVE-2021-32687

Redis vulnerability

CVSS
7.5
EPSS
3.8%
EPSS pct
89th
Exploited
No known
Redis is an open source, in-memory database that persists on disk. An integer overflow bug affecting all versions of Redis can be exploited to corrupt the heap and potentially be used to leak arbitrary contents of the heap or trigger remote code execution. The vulnerability involves changing the default set-max-intset-entries configuration parameter to a very large value and constructing specially crafted commands to manipulate sets. 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 set-max-intset-entries configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.
Affected vendor
Redis
Affected product
Redis
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2021-10-04

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2021-32687

  • Confirm whether Redis Redis is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-32687.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-32687

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