CVE-2023-49786
published 2023-12-14CVE-2023-49786: Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as…
PriorityP434medium5.9CVSS 3.1
AVNACHPRNUINSUCNINAH
EPSS
5.34%
91.6th percentile
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| asterisk | asterisk | < 18.20.1 | 18.20.1 |
| asterisk | asterisk | < 18.9-cert6 | 18.9-cert6 |
| asterisk | asterisk | — | — |
| asterisk | asterisk | — | — |
| asterisk | asterisk | >= 0 < 1:16.28.0~dfsg-0+deb11u4 | 1:16.28.0~dfsg-0+deb11u4 |
| debian | asterisk | < asterisk 1:16.28.0~dfsg-0+deb11u4 (bullseye) | asterisk 1:16.28.0~dfsg-0+deb11u4 (bullseye) |
| digium | asterisk | < 18.20.1 | 18.20.1 |
| digium | asterisk | — | — |
| digium | asterisk | >= 19.0.0 < 20.5.1 | 20.5.1 |
| sangoma | certified_asterisk | — | — |
| sangoma | certified_asterisk | — | — |
| sangoma | certified_asterisk | — | — |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
osv5.9MEDIUM
vendor_debian7.5HIGH
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Debian
CVE-2023-49786: asterisk - Asterisk is an open source private branch exchange and telephony toolkit. In Ast...
vendor_debian·2023·CVSS 7.5
CVE-2023-49786 [HIGH] CVE-2023-49786: asterisk - Asterisk is an open source private branch exchange and telephony toolkit. In Ast...
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.
Scope: local
bullseye: resolved (fixed in 1:16.28.0~dfsg-0+deb11u4)
sid: resolved (fixed in 1:20.5.1~dfs
OSV
CVE-2023-49786: Asterisk is an open source private branch exchange and telephony toolkit
osv·2023-12-14·CVSS 5.9
CVE-2023-49786 [MEDIUM] CVE-2023-49786: Asterisk is an open source private branch exchange and telephony toolkit
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.
No detection rules found.
No public exploits indexed.
Bugzilla
TRIAGE CVE-2023-49786 asterisk: race condition in the hello handshake phase of the DTLS protocol triggers denial of service [fedora-all]
bugzilla·2023-12-14·CVSS 7.5
CVE-2023-49786 [HIGH] TRIAGE CVE-2023-49786 asterisk: race condition in the hello handshake phase of the DTLS protocol triggers denial of service [fedora-all]
TRIAGE CVE-2023-49786 asterisk: race condition in the hello handshake phase of the DTLS protocol triggers denial of service [fedora-all]
More information about this security flaw is available in the following bug:
http://bugzilla.redhat.com/show_bug.cgi?id=2254633
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
Use the following template to for the 'fedpkg update' request to submit an
update for this issue as it contains the top-level parent bug(s) as well as
this tracking bug. This will ensure that all associated bugs get updated
when new packages are pushed to stable.
# bugfix, security, enhancem
Bugzilla
TRIAGE CVE-2023-49786 asterisk: race condition in the hello handshake phase of the DTLS protocol triggers denial of service [epel-all]
bugzilla·2023-12-14·CVSS 7.5
CVE-2023-49786 [HIGH] TRIAGE CVE-2023-49786 asterisk: race condition in the hello handshake phase of the DTLS protocol triggers denial of service [epel-all]
TRIAGE CVE-2023-49786 asterisk: race condition in the hello handshake phase of the DTLS protocol triggers denial of service [epel-all]
More information about this security flaw is available in the following bug:
http://bugzilla.redhat.com/show_bug.cgi?id=2254633
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
Use the following template to for the 'fedpkg update' request to submit an
update for this issue as it contains the top-level parent bug(s) as well as
this tracking bug. This will ensure that all associated bugs get updated
when new packages are pushed to stable.
# bugfix, security, enhancemen
http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.htmlhttp://seclists.org/fulldisclosure/2023/Dec/24http://www.openwall.com/lists/oss-security/2023/12/15/7https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-racehttps://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pqhttps://lists.debian.org/debian-lts-announce/2023/12/msg00019.htmlhttp://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.htmlhttp://seclists.org/fulldisclosure/2023/Dec/24http://www.openwall.com/lists/oss-security/2023/12/15/7https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-racehttps://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pqhttps://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
2023-12-14
Published