{"id":"ALPINE-CVE-2021-37706","details":"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 affected versions if the incoming STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting in an integer underflow scenario. This issue affects all users that use STUN. A malicious actor located within the victim’s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim’s machine. Users are advised to upgrade as soon as possible. There are no known workarounds.","modified":"2026-03-09T01:22:50.787519Z","published":"2021-12-22T18:15:07.487Z","upstream":["CVE-2021-37706"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-37706"}],"affected":[{"package":{"name":"pjproject","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}],"versions":["1.0.1-r0","1.10-r0","1.4-r0","1.4-r1","1.6-r0","1.6-r1","1.6-r2","2.0-r0","2.1-r0","2.11-r0","2.11.1-r0","2.11.1-r1","2.11.1-r2","2.2-r0","2.2.1-r0","2.3-r0","2.4-r0","2.4.5-r0","2.5.5-r0","2.5.5-r1","2.5.5-r2","2.5.5-r3","2.5.5-r4","2.7.2-r0","2.7.2-r1","2.7.2-r2","2.7.2-r3","2.7.2-r4","2.8-r0","2.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37706.json"}},{"package":{"name":"pjproject","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}],"versions":["1.0.1-r0","1.10-r0","1.4-r0","1.4-r1","1.6-r0","1.6-r1","1.6-r2","2.0-r0","2.1-r0","2.11-r0","2.11.1-r0","2.11.1-r1","2.11.1-r2","2.2-r0","2.2.1-r0","2.3-r0","2.4-r0","2.4.5-r0","2.5.5-r0","2.5.5-r1","2.5.5-r2","2.5.5-r3","2.5.5-r4","2.7.2-r0","2.7.2-r1","2.7.2-r2","2.7.2-r3","2.7.2-r4","2.8-r0","2.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37706.json"}},{"package":{"name":"pjproject","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}],"versions":["1.0.1-r0","1.10-r0","1.4-r0","1.4-r1","1.6-r0","1.6-r1","1.6-r2","2.0-r0","2.1-r0","2.11-r0","2.11.1-r0","2.11.1-r1","2.11.1-r2","2.2-r0","2.2.1-r0","2.3-r0","2.4-r0","2.4.5-r0","2.5.5-r0","2.5.5-r1","2.5.5-r2","2.5.5-r3","2.5.5-r4","2.7.2-r0","2.7.2-r1","2.7.2-r2","2.7.2-r3","2.7.2-r4","2.8-r0","2.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37706.json"}},{"package":{"name":"pjproject","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}],"versions":["1.0.1-r0","1.10-r0","1.4-r0","1.4-r1","1.6-r0","1.6-r1","1.6-r2","2.0-r0","2.1-r0","2.11-r0","2.11.1-r0","2.11.1-r1","2.11.1-r2","2.2-r0","2.2.1-r0","2.3-r0","2.4-r0","2.4.5-r0","2.5.5-r0","2.5.5-r1","2.5.5-r2","2.5.5-r3","2.5.5-r4","2.7.2-r0","2.7.2-r1","2.7.2-r2","2.7.2-r3","2.7.2-r4","2.8-r0","2.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37706.json"}},{"package":{"name":"pjproject","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}],"versions":["1.0.1-r0","1.10-r0","1.4-r0","1.4-r1","1.6-r0","1.6-r1","1.6-r2","2.0-r0","2.1-r0","2.11-r0","2.11.1-r0","2.11.1-r1","2.11.1-r2","2.2-r0","2.2.1-r0","2.3-r0","2.4-r0","2.4.5-r0","2.5.5-r0","2.5.5-r1","2.5.5-r2","2.5.5-r3","2.5.5-r4","2.7.2-r0","2.7.2-r1","2.7.2-r2","2.7.2-r3","2.7.2-r4","2.8-r0","2.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37706.json"}},{"package":{"name":"pjproject","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}],"versions":["1.0.1-r0","1.10-r0","1.4-r0","1.4-r1","1.6-r0","1.6-r1","1.6-r2","2.0-r0","2.1-r0","2.11-r0","2.11.1-r0","2.11.1-r1","2.11.1-r2","2.2-r0","2.2.1-r0","2.3-r0","2.4-r0","2.4.5-r0","2.5.5-r0","2.5.5-r1","2.5.5-r2","2.5.5-r3","2.5.5-r4","2.7.2-r0","2.7.2-r1","2.7.2-r2","2.7.2-r3","2.7.2-r4","2.8-r0","2.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37706.json"}},{"package":{"name":"pjproject","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}],"versions":["1.0.1-r0","1.10-r0","1.4-r0","1.4-r1","1.6-r0","1.6-r1","1.6-r2","2.0-r0","2.1-r0","2.11-r0","2.11.1-r0","2.11.1-r1","2.11.1-r2","2.2-r0","2.2.1-r0","2.3-r0","2.4-r0","2.4.5-r0","2.5.5-r0","2.5.5-r1","2.5.5-r2","2.5.5-r3","2.5.5-r4","2.7.2-r0","2.7.2-r1","2.7.2-r2","2.7.2-r3","2.7.2-r4","2.8-r0","2.9-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-37706.json"}},{"package":{"name":"pjproject","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/pjproject?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"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