DEBIAN-CVE-2021-36369

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Source
https://security-tracker.debian.org/tracker/CVE-2021-36369
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-36369.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-36369
Upstream
Published
2022-10-12T21:15:09Z
Modified
2025-09-25T23:25:21.381968Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

An issue was discovered in Dropbear through 2020.81. Due to a non-RFC-compliant check of the available authentication methods in the client-side SSH code, it is possible for an SSH server to change the login process in its favor. This attack can bypass additional security measures such as FIDO2 tokens or SSH-Askpass. Thus, it allows an attacker to abuse a forwarded agent for logging on to another server unnoticed.

References

Affected packages

Debian:11 / dropbear

Package

Name
dropbear
Purl
pkg:deb/debian/dropbear?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2020.81-3+deb11u1

Affected versions

2020.*

2020.81-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / dropbear

Package

Name
dropbear
Purl
pkg:deb/debian/dropbear?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2022.82-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / dropbear

Package

Name
dropbear
Purl
pkg:deb/debian/dropbear?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2022.82-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / dropbear

Package

Name
dropbear
Purl
pkg:deb/debian/dropbear?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2022.82-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}