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Vulnerability · Published Jul 27, 2021 · Assigned by mitre

CVE-2021-32558

High 7.5

In plain English

A high-severity security flaw in the asterisk package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 9.2% (higher than 95% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High
Exploit odds (30 days)9.2%top 4.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20asterisk18.2.2-r2ALPINE-CVE-2021-32558
Alpine:v3.21asterisk18.2.2-r2ALPINE-CVE-2021-32558
Alpine:v3.22asterisk18.2.2-r2ALPINE-CVE-2021-32558
Alpine:v3.23asterisk18.2.2-r2ALPINE-CVE-2021-32558
Alpine:v3.24asterisk18.2.2-r2ALPINE-CVE-2021-32558
Debian:14asterisk1:16.16.1~dfsg-2DEBIAN-CVE-2021-32558
Ubuntu:22.04:LTSasteriskno fix listedUBUNTU-CVE-2021-32558
Ubuntu:24.04:LTSasteriskno fix listedUBUNTU-CVE-2021-32558
Ubuntu:25.10asteriskno fix listedUBUNTU-CVE-2021-32558
Ubuntu:26.04:LTSasteriskno fix listedUBUNTU-CVE-2021-32558
Ubuntu:26.10asteriskno fix listedUBUNTU-CVE-2021-32558

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References