Vulnerability Details CVE-2021-32686
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 before version 2.11.1, there are a couple of issues found in the SSL socket. First, a race condition between callback and destroy, due to the accepted socket having no group lock. Second, the SSL socket parent/listener may get destroyed during handshake. Both issues were reported to happen intermittently in heavy load TLS connections. They cause a crash, resulting in a denial of service. These are fixed in version 2.11.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 51.4%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 4.3
Products affected by CVE-2021-32686
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cpe:2.3:a:teluu:pjsip:0.5.0.1
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cpe:2.3:a:teluu:pjsip:0.5.10
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cpe:2.3:a:teluu:pjsip:0.5.10.1
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cpe:2.3:a:teluu:pjsip:0.5.10.2
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cpe:2.3:a:teluu:pjsip:0.5.10.3
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cpe:2.3:a:teluu:pjsip:0.5.10.4
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cpe:2.3:a:teluu:pjsip:0.5.2
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cpe:2.3:a:teluu:pjsip:0.5.3
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cpe:2.3:a:teluu:pjsip:0.5.4
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cpe:2.3:a:teluu:pjsip:0.5.5.1
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cpe:2.3:a:teluu:pjsip:0.5.6
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cpe:2.3:a:teluu:pjsip:0.5.6.1
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cpe:2.3:a:teluu:pjsip:0.5.7
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cpe:2.3:a:teluu:pjsip:0.5.8
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cpe:2.3:a:teluu:pjsip:0.5.9
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cpe:2.3:a:teluu:pjsip:0.7.0
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cpe:2.3:a:teluu:pjsip:0.8.0
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cpe:2.3:a:teluu:pjsip:0.9.0
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cpe:2.3:a:teluu:pjsip:1.0
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cpe:2.3:a:teluu:pjsip:1.0.1
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cpe:2.3:a:teluu:pjsip:1.0.2
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cpe:2.3:a:teluu:pjsip:1.0.3
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cpe:2.3:a:teluu:pjsip:1.1
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cpe:2.3:a:teluu:pjsip:1.10
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cpe:2.3:a:teluu:pjsip:1.12
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cpe:2.3:a:teluu:pjsip:1.14
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cpe:2.3:a:teluu:pjsip:1.14.2
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cpe:2.3:a:teluu:pjsip:1.16
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cpe:2.3:a:teluu:pjsip:1.2
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cpe:2.3:a:teluu:pjsip:1.3
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cpe:2.3:a:teluu:pjsip:1.4
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cpe:2.3:a:teluu:pjsip:1.4.5
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cpe:2.3:a:teluu:pjsip:1.5
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cpe:2.3:a:teluu:pjsip:1.5.5
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cpe:2.3:a:teluu:pjsip:1.6
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cpe:2.3:a:teluu:pjsip:1.7
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cpe:2.3:a:teluu:pjsip:1.8
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cpe:2.3:a:teluu:pjsip:1.8.10
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cpe:2.3:a:teluu:pjsip:1.8.5
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cpe:2.3:a:teluu:pjsip:2.0
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cpe:2.3:a:teluu:pjsip:2.0.1
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cpe:2.3:a:teluu:pjsip:2.1
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cpe:2.3:a:teluu:pjsip:2.10
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cpe:2.3:a:teluu:pjsip:2.11
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cpe:2.3:a:teluu:pjsip:2.2
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cpe:2.3:a:teluu:pjsip:2.2.1
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cpe:2.3:a:teluu:pjsip:2.3
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cpe:2.3:a:teluu:pjsip:2.4
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cpe:2.3:a:teluu:pjsip:2.4.5
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cpe:2.3:a:teluu:pjsip:2.5
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cpe:2.3:a:teluu:pjsip:2.5.1
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cpe:2.3:a:teluu:pjsip:2.5.5
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cpe:2.3:a:teluu:pjsip:2.6
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cpe:2.3:a:teluu:pjsip:2.7
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cpe:2.3:a:teluu:pjsip:2.7.1
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cpe:2.3:a:teluu:pjsip:2.7.2
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cpe:2.3:a:teluu:pjsip:2.8
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cpe:2.3:a:teluu:pjsip:2.9
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cpe:2.3:o:debian:debian_linux:11.0
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cpe:2.3:o:debian:debian_linux:9.0