CVE-2019-3859

Advisory lineage Upstream: 0 Downstream: 21
Modified
Published: 20 Mar 2019, 21:18
Last modified:18 Dec 2025, 11:43

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.1 CRITICAL
v3.1 (cve.org)
EPSS Score
1.18% LOW
1% probability +0.29%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Mar 2019, 21:18
Published
Vulnerability first disclosed
18 Dec 2025, 11:43
Last Modified
Vulnerability information updated

Description

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
  • v3.0•MEDIUM•Score: 5CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
  • v3.0•CRITICAL•Score: 9.1CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
  • v2.0•MEDIUM•Score: 6.4AV:N/AC:L/Au:N/C:P/I:N/A:P

EPSS Trends

Current EPSS score: 1.18%• Percentile: 79%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•debian_linux

    8.0 | 9.0

  • fedoraproject•fedora

    28 | 29

  • libssh2•libssh2

    < 1.8.1

  • netapp•ontap_select_deploy_administration_utility

    na

  • opensuse•leap

    15.0 | 42.3

  • the libssh2 project•libssh2

    1.8.1

References (20)