Is CVE-2021-46823 in the CISA KEV catalog?

No. CVE-2021-46823 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-46823?

CVE-2021-46823 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-46823?

CVE-2021-46823 has an EPSS score of 1.71% (75th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-46823?

Upgrade python-ldap on debian 12 to 3.4.0-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2021-46823

MEDIUMEPSS 75th pctl

6.5

CVSS v3

NVD

Description

python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability to cause a denial of service condition.

CWE-1333

How to fix

Remediation Available

python-ldapDebian

Fixed in:3.4.0-1CVE-2021-46823

python-ldapUbuntu

Fixed in:3.0.0-1ubuntu0.2USN-5508-1

Fixed in:3.2.0-4ubuntu2.1USN-5508-1

Fixed in:3.2.0-4ubuntu7.1USN-5508-1

python-pyldapUbuntu

Fixed in:3.0.0-1ubuntu0.2USN-5508-1

python3-ldapUbuntu

Fixed in:3.0.0-1ubuntu0.2USN-5508-1

Fixed in:3.2.0-4ubuntu2.1USN-5508-1

Fixed in:3.2.0-4ubuntu7.1USN-5508-1

python3-pyldapUbuntu

Fixed in:3.0.0-1ubuntu0.2USN-5508-1

Fixed in:3.2.0-4ubuntu2.1USN-5508-1

Fixed in:3.2.0-4ubuntu7.1USN-5508-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.71%probability of exploitation in 30 days

75thpercentile

Elevated risk: more likely to be exploited than 75% of all known CVEs.

References

Third-Party Advisory2

Related Vulnerabilities

Other CWE-1333 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-3364	High	7.5	45%	-	Fix
CVE-2024-8124	High	7.5	40%	-	Fix
CVE-2024-25126	Medium	5.3	35%	-	Fix
CVE-2024-2651	Medium	6.5	33%	-	Fix
CVE-2021-32837	High	7.5	29%	-	Fix
CVE-2024-2829	High	7.5	26%	-	Fix

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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.