Is CVE-2021-41099 in the CISA KEV catalog?

No. CVE-2021-41099 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-41099?

CVE-2021-41099 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-41099?

CVE-2021-41099 has an EPSS score of 3.42% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-41099?

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-2021-41099

HIGHEPSS 87th pctl

7.5

CVSS v3

NVD

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.

CWE-190Integer Overflow CWE-680

How to fix

Remediation Available

redisDebian

Fixed in:5:6.0.16-1+deb11u1CVE-2021-41099

Fixed in:5:6.0.16-1CVE-2021-41099

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:6.0.0 6.0.16Fixed in:6.0.16MSOpenTech

Affected:5.0.0 5.0.14Fixed in:5.0.14MSOpenTech

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

3.42%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% 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.