Is CVE-2021-32765 in the CISA KEV catalog?

No. CVE-2021-32765 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-32765?

CVE-2021-32765 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-32765?

CVE-2021-32765 has an EPSS score of 2.04% (79th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-32765?

Upgrade hiredis on debian 12 to 0.14.1-2 or later.

CVE & CISA-KEV Catalog

CVE-2021-32765

HIGHEPSS 79th pctl

8.8

CVSS v3

NVD

Description

Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count * sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of hiredis who are unable to update may set the maxelements context option to a value small enough that no overflow is possible.

CWE-190Integer Overflow CWE-680

How to fix

Remediation Available

hiredisDebian

Fixed in:0.14.1-2CVE-2021-32765

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 ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.04%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Patch1

github.com

Mitigation1

github.com

Third-Party Advisory4

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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.