Is CVE-2021-32558 in the CISA KEV catalog?

No. CVE-2021-32558 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-32558?

CVE-2021-32558 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-32558?

CVE-2021-32558 has an EPSS score of 9.11% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-32558?

Upgrade asterisk on debian 11 to 1:16.16.1~dfsg-1+deb11u1 or later.

CVE & CISA-KEV Catalog

CVE-2021-32558

HIGHEPSS 95th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x before 18.5.1, and Certified Asterisk before 16.8-cert10. If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.

CWE-74Injection

How to fix

Remediation Available

asteriskDebian

Fixed in:1:16.16.1~dfsg-1+deb11u1CVE-2021-32558

Fixed in:1:16.16.1~dfsg-2CVE-2021-32558

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

9.11%probability of exploitation in 30 days

95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

Patch4

Third-Party Advisory2

Related Vulnerabilities

Other CWE-74 (Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2013-2251	Critical	9.8	100%	KEV	Fix
CVE-2023-22527	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-2725	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2022-35914	Critical	9.8	100%	KEV	-
CVE-2019-17558	High	7.5	99%	KEV	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.