ID CVE-2020-1730
Summary 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
Vulnerable Configurations
  • cpe:2.3:a:libssh:libssh:0.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.3:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.3:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.4:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.4:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.5:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.5:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.6:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.6:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.7:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.7:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.8.8:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.8.8:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:libssh:libssh:0.9.3:*:*:*:*:*:*:*
    cpe:2.3:a:libssh:libssh:0.9.3:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
    cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:-:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:-:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:5.2.47:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:5.2.47:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:6.0.9:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:6.0.9:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:6.1.7:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:6.1.7:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:6.2.5:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:6.2.5:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:6.3.8:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:6.3.8:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:6.3.10:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:6.3.10:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.12:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.12:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.13:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.13:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.14:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.14:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.15:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.15:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.16:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.16:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.17:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.17:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.18:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.18:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.19:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.19:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.20:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.20:*:*:*:*:*:*:*
  • cpe:2.3:a:oracle:mysql_workbench:8.0.21:*:*:*:*:*:*:*
    cpe:2.3:a:oracle:mysql_workbench:8.0.21:*:*:*:*:*:*:*
CVSS
Base: 5.0 (as of 14-09-2021 - 13:39)
Impact:
Exploitability:
CWE CWE-476
CAPEC
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE PARTIAL
cvss-vector via4 AV:N/AC:L/Au:N/C:N/I:N/A:P
redhat via4
advisories
bugzilla
id 1849071
title libssh ssh_channel_read() randomly returns error
oval
OR
  • comment Red Hat Enterprise Linux must be installed
    oval oval:com.redhat.rhba:tst:20070304026
  • AND
    • comment Red Hat Enterprise Linux 8 is installed
      oval oval:com.redhat.rhba:tst:20193384074
    • OR
      • AND
        • comment libssh is earlier than 0:0.9.4-2.el8
          oval oval:com.redhat.rhsa:tst:20204545001
        • comment libssh is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20204545002
      • AND
        • comment libssh-config is earlier than 0:0.9.4-2.el8
          oval oval:com.redhat.rhsa:tst:20204545003
        • comment libssh-config is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20204545004
      • AND
        • comment libssh-debugsource is earlier than 0:0.9.4-2.el8
          oval oval:com.redhat.rhsa:tst:20204545005
        • comment libssh-debugsource is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20204545006
      • AND
        • comment libssh-devel is earlier than 0:0.9.4-2.el8
          oval oval:com.redhat.rhsa:tst:20204545007
        • comment libssh-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20204545008
rhsa
id RHSA-2020:4545
released 2020-11-04
severity Moderate
title RHSA-2020:4545: libssh security, bug fix, and enhancement update (Moderate)
rpms
  • libssh-0:0.9.4-2.el8
  • libssh-config-0:0.9.4-2.el8
  • libssh-debuginfo-0:0.9.4-2.el8
  • libssh-debugsource-0:0.9.4-2.el8
  • libssh-devel-0:0.9.4-2.el8
  • imgbased-0:1.2.13-0.1.el8ev
  • python3-imgbased-0:1.2.13-0.1.el8ev
  • redhat-release-virtualization-host-0:4.4.3-1.el8ev
  • redhat-virtualization-host-image-update-0:4.4.3-20201116.0.el8_3
  • redhat-virtualization-host-image-update-placeholder-0:4.4.3-1.el8ev
refmap via4
confirm
fedora
  • FEDORA-2020-5a77f0d68f
  • FEDORA-2020-6cad41abb0
misc
ubuntu USN-4327-1
Last major update 14-09-2021 - 13:39
Published 13-04-2020 - 19:15
Last modified 14-09-2021 - 13:39
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