CVE-2020-26262
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2020-26262
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-26262.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2020-26262
- Aliases
-
- GHSA-6g6j-r9rf-cm7p
- Related
- Published
- 2021-01-13T19:15:16Z
- Modified
- 2024-10-12T06:24:25.341990Z
- Severity
-
- 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- [none]
- Details
-
Coturn is free open source implementation of TURN and STUN Server. Coturn before version 4.5.2 by default does not allow peers to connect and relay packets to loopback addresses in the range of
127.x.x.x. However, it was observed that when sending aCONNECTrequest with theXOR-PEER-ADDRESSvalue of0.0.0.0, a successful response was received and subsequently,CONNECTIONBINDalso received a successful response. Coturn then is able to relay packets to the loopback interface. Additionally, when coturn is listening on IPv6, which is default, the loopback interface can also be reached by making use of either[::1]or[::]as the peer address. By using the address0.0.0.0as the peer address, a malicious user will be able to relay packets to the loopback interface, unless--denied-peer-ip=0.0.0.0(or similar) has been specified. Since the default configuration implies that loopback peers are not allowed, coturn administrators may choose to not set thedenied-peer-ipsetting. The issue patched in version 4.5.2. As a workaround the addresses in the address block0.0.0.0/8,[::1]and[::]should be denied by default unless--allow-loopback-peershas been specified. - References
-
- https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p
- https://github.com/coturn/coturn/commit/abfe1fd08d78baa0947d17dac0f7411c3d948e4d
- https://github.com/coturn/coturn/blob/57180ab60afcaeb13537e69ae8cb8aefd8f3f546/ChangeLog#L48
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G54UIUFTEC6RLPOISMB6FUW7456SBZC4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4CJOPAQT43MYAFU3UROGLEXN3Z6RS4H/
- https://security-tracker.debian.org/tracker/CVE-2020-26262
Affected packages
Debian:11 / coturn
Package
- Name
- coturn
- Purl
- pkg:deb/debian/coturn?arch=source
Debian:12 / coturn
Package
- Name
- coturn
- Purl
- pkg:deb/debian/coturn?arch=source
Debian:13 / coturn
Package
- Name
- coturn
- Purl
- pkg:deb/debian/coturn?arch=source