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NULL Pointer Dereference Affecting libssh package, versions <0:0.9.4-2.el8

Severity

 Recommended
0.0
medium
0
10

Based on Oracle Linux security rating

    Threat Intelligence

    EPSS
    0.41% (75th percentile)

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  • Snyk ID SNYK-ORACLE8-LIBSSH-2569219
  • published 10 Apr 2022
  • disclosed 13 Apr 2020
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Introduced: 13 Apr 2020

CVE-2020-1730 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Oracle:8 libssh to version 0:0.9.4-2.el8 or higher.
This issue was patched in ELSA-2020-4545.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh package and not the libssh package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.

References

CVSS Scores

version 3.1
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NVD

5.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    Low
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SUSE

5.3 medium
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Red Hat

5.3 medium