CVE & CISA-KEV Catalog

CVE-2021-21375

MEDIUMEPSS 79th pctl
6.5
CVSS v3
NVD

Description

PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In PJSIP version 2.10 and earlier, after an initial INVITE has been sent, when two 183 responses are received, with the first one causing negotiation failure, a crash will occur. This results in a denial of service.

CWE-400Resource ExhaustionCWE-754

How to fix

Remediation Available
ringDebian
Fixed in:20210112.2.b757bac~ds1-1CVE-2021-21375
Fixed in:20210112.2.b757bac~ds1-1CVE-2021-21375
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

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 InteractionRequired
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

2.09%probability of exploitation in 30 days
79thpercentile

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

References

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CVE-2021-21375 severity badge

Markdown

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HTML

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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.