Is CVE-2021-32627 in the CISA KEV catalog?

No. CVE-2021-32627 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-32627?

CVE-2021-32627 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-32627?

CVE-2021-32627 has an EPSS score of 3.69% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-32627?

Upgrade redis on debian 11 to 5:6.0.16-1+deb11u1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2021-32627

HIGHEPSS 88th pctl

7.5

CVSS v3

NVD

Description

Redis is an open source, in-memory database that persists on disk. In affected versions an integer overflow bug in Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves changing the default proto-max-bulk-len and client-query-buffer-limit configuration parameters to very large values and constructing specially crafted very large stream elements. The problem is fixed in Redis 6.2.6, 6.0.16 and 5.0.14. For users unable to upgrade 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.

CWE-190Integer Overflow CWE-680

How to fix

Remediation Available

redisDebian

Fixed in:5:6.0.16-1+deb11u1CVE-2021-32627

Fixed in:5:6.0.16-1CVE-2021-32627

redisUbuntu

Fixed in:2:2.8.4-2ubuntu0.2+esm2USN-5221-1

Fixed in:2:3.0.6-1ubuntu0.4+esm1USN-5221-1

Fixed in:5:4.0.9-1ubuntu0.2+esm3USN-5221-1

Fixed in:5:5.0.7-2ubuntu0.1+esm1USN-5221-1

redis-serverUbuntu

Fixed in:2:2.8.4-2ubuntu0.2+esm2USN-5221-1

Fixed in:2:3.0.6-1ubuntu0.4+esm1USN-5221-1

redis-toolsUbuntu

Fixed in:2:2.8.4-2ubuntu0.2+esm2USN-5221-1

Fixed in:2:3.0.6-1ubuntu0.4+esm1USN-5221-1

Fixed in:5:4.0.9-1ubuntu0.2+esm3USN-5221-1

Fixed in:5:5.0.7-2ubuntu0.1+esm1USN-5221-1

Redis on WindowsWindows application

Affected:6.2.0 6.2.6Fixed in:6.2.6MSOpenTech

Affected:5.0.0 5.0.14Fixed in:5.0.14MSOpenTech

Affected:6.0.0 6.0.16Fixed in:6.0.16MSOpenTech

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.69%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch2

Third-Party Advisory4

Other references3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.