Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.0109
coturn security update
13 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: coturn
Publisher: Debian
Operating System: Debian GNU/Linux
Impact/Access: Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-26262
Reference: ESB-2021.0098
Original Bulletin:
https://lists.debian.org/debian-lts-announce/2021/01/msg00011.html
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Debian LTS Advisory DLA-2522-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
January 12, 2021 https://wiki.debian.org/LTS
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Package : coturn
Version : 4.5.0.5-1+deb9u3
CVE ID : CVE-2020-26262
A flaw was discovered in coturn, a TURN and STUN server for VoIP. By
default coturn does not allow peers on the loopback addresses
(127.x.x.x and ::1). A remote attacker can bypass the protection via a
specially crafted request using a peer address of '0.0.0.0' and trick
coturn in relaying to the loopback interface. If listening on IPv6 the
loopback interface can also be reached by using either [::1] or [::] as
the address.
For Debian 9 stretch, this problem has been fixed in version
4.5.0.5-1+deb9u3.
We recommend that you upgrade your coturn packages.
For the detailed security status of coturn please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/coturn
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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