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asyncssh@2.21.0

AsyncSSH: Asynchronous SSHv2 client and server library

  • latest version

    2.23.0

  • latest non vulnerable version

    2.23.0

  • first published

    11 years ago

  • latest version published

    23 days ago

  • licenses detected

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    Direct Vulnerabilities

    Known vulnerabilities in the asyncssh package. This does not include vulnerabilities belonging to this package’s dependencies.

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    VulnerabilityVulnerable Version
    • H
    Directory Traversal

    Affected versions of this package are vulnerable to Directory Traversal via the AuthorizedKeysFile %u token. An attacker can gain unauthorized SSH authentication by supplying a specially crafted username containing path traversal sequences, allowing the server to read an attacker-controlled authorized-keys file outside the intended directory.

    Note: This is only exploitable if all the following are true:

    1. The server is configured with an AuthorizedKeysFile pattern containing %u.

    2. Public-key authentication is enabled.

    3. The attacker can place or reference a readable authorized-keys-format file outside the intended directory.

    4. The application does not separately reject usernames containing /, \, or .. before use.

    How to fix Directory Traversal?

    Upgrade asyncssh to version 2.23.0 or higher.

    [,2.23.0)
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