CVE & CISA-KEV Catalog

CVE-2021-43302

CRITICALEPSS 80th pctl

9.1

CVSS v3

Description

Read out-of-bounds in PJSUA API when calling pjsua_recorder_create. An attacker-controlled 'filename' argument may cause an out-of-bounds read when the filename is shorter than 4 characters.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

asteriskDebian

Fixed in:1:16.28.0~dfsg-0+deb11u1CVE-2021-43302

Fixed in:1:18.11.1~dfsg+~cs6.10.40431413-1CVE-2021-43302

jamiUbuntu

Fixed in:20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1USN-6422-1

Fixed in:20230206.0~ds1-5ubuntu0.1USN-6422-1

jami-daemonUbuntu

Fixed in:20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1USN-6422-1

Fixed in:20230206.0~ds1-5ubuntu0.1USN-6422-1

libpj2Ubuntu

Fixed in:2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1USN-8122-1

Fixed in:2.7.2~dfsg-1ubuntu0.1~esm1USN-8122-1

libpjmedia2Ubuntu

Fixed in:2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1USN-8122-1

Fixed in:2.7.2~dfsg-1ubuntu0.1~esm1USN-8122-1

libpjnath2Ubuntu

Fixed in:2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1USN-8122-1

Fixed in:2.7.2~dfsg-1ubuntu0.1~esm1USN-8122-1

libpjsip2Ubuntu

Fixed in:2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1USN-8122-1

Fixed in:2.7.2~dfsg-1ubuntu0.1~esm1USN-8122-1

libpjsua2Ubuntu

Fixed in:2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1USN-8122-1

Fixed in:2.7.2~dfsg-1ubuntu0.1~esm1USN-8122-1

pjprojectUbuntu

Fixed in:2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1USN-8122-1

Fixed in:2.7.2~dfsg-1ubuntu0.1~esm1USN-8122-1

python-pjprojectUbuntu

Fixed in:2.7.2~dfsg-1ubuntu0.1~esm1USN-8122-1

ringUbuntu

Fixed in:20180228.1.503da2b~ds1-1ubuntu0.1~esm1USN-6422-1

Fixed in:20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1USN-6422-1

Fixed in:20230206.0~ds1-5ubuntu0.1USN-6422-1

ring-daemonUbuntu

Fixed in:20180228.1.503da2b~ds1-1ubuntu0.1~esm1USN-6422-1

Fixed in:20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1USN-6422-1

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

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.16%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory3

Other references2

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	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 2025-11-04.