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CVE-2023-2283

CVE-2023-2283

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.

CVSS 6.5 · Medium · EPSS 1.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • libssh

    Versions
    • libssh-2: Affected

    No fix published

  • libssh Debian:12

    Affected ranges
    • ECOSYSTEM: < 0.10.5-1

    Update to 0.10.5-1

  • libssh Debian:13

    Affected ranges
    • ECOSYSTEM: < 0.10.5-1

    Update to 0.10.5-1

  • libssh Debian:14

    Affected ranges
    • ECOSYSTEM: < 0.10.5-1

    Update to 0.10.5-1

  • libssh Ubuntu:20.04:LTS

    Versions
    • 0.9.0-1ubuntu1
    • 0.9.0-1ubuntu4
    • 0.9.0-1ubuntu5
    • 0.9.3-2ubuntu1
    • 0.9.3-2ubuntu2
    • 0.9.3-2ubuntu2.1
    • 0.9.3-2ubuntu2.2
    Affected ranges
    • ECOSYSTEM: < 0.9.3-2ubuntu2.3

    Update to 0.9.3-2ubuntu2.3

  • libssh Ubuntu:22.04:LTS

    Versions
    • 0.9.6-1
    • 0.9.6-1build1
    • 0.9.6-2
    • 0.9.6-2build1
    Affected ranges
    • ECOSYSTEM: < 0.9.6-2ubuntu0.22.04.1

    Update to 0.9.6-2ubuntu0.22.04.1

Original sources

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