ID CVE-2017-5885
Summary Multiple integer overflows in the (1) vnc_connection_server_message and (2) vnc_color_map_set functions in gtk-vnc before 0.7.0 allow remote servers to cause a denial of service (crash) or possibly execute arbitrary code via vectors involving SetColorMapEntries, which triggers a buffer overflow.
References
Vulnerable Configurations
  • cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
    cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
  • cpe:2.3:a:gnome:gtk-vnc:*:*:*:*:*:*:*:*
    cpe:2.3:a:gnome:gtk-vnc:*:*:*:*:*:*:*:*
CVSS
Base: 7.5 (as of 05-01-2018 - 02:31)
Impact:
Exploitability:
CWE CWE-190
CAPEC
  • Forced Integer Overflow
    This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
cvss-vector via4 AV:N/AC:L/Au:N/C:P/I:P/A:P
redhat via4
advisories
bugzilla
id 1441120
title segment fault when connecting a host with no VNC server listening
oval
AND
  • OR
    • comment Red Hat Enterprise Linux 7 Client is installed
      oval oval:com.redhat.rhba:tst:20150364001
    • comment Red Hat Enterprise Linux 7 Server is installed
      oval oval:com.redhat.rhba:tst:20150364002
    • comment Red Hat Enterprise Linux 7 Workstation is installed
      oval oval:com.redhat.rhba:tst:20150364003
    • comment Red Hat Enterprise Linux 7 ComputeNode is installed
      oval oval:com.redhat.rhba:tst:20150364004
  • OR
    • AND
      • comment gtk-vnc is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258023
      • comment gtk-vnc is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258024
    • AND
      • comment gtk-vnc-devel is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258021
      • comment gtk-vnc-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258022
    • AND
      • comment gtk-vnc-python is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258013
      • comment gtk-vnc-python is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258014
    • AND
      • comment gtk-vnc2 is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258005
      • comment gtk-vnc2 is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258006
    • AND
      • comment gtk-vnc2-devel is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258007
      • comment gtk-vnc2-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258008
    • AND
      • comment gvnc is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258017
      • comment gvnc is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258018
    • AND
      • comment gvnc-devel is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258009
      • comment gvnc-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258010
    • AND
      • comment gvnc-tools is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258015
      • comment gvnc-tools is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258016
    • AND
      • comment gvncpulse is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258011
      • comment gvncpulse is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258012
    • AND
      • comment gvncpulse-devel is earlier than 0:0.7.0-2.el7
        oval oval:com.redhat.rhsa:tst:20172258019
      • comment gvncpulse-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20172258020
rhsa
id RHSA-2017:2258
released 2017-08-01
severity Moderate
title RHSA-2017:2258: gtk-vnc security, bug fix, and enhancement update (Moderate)
rpms
  • gtk-vnc-0:0.7.0-2.el7
  • gtk-vnc-devel-0:0.7.0-2.el7
  • gtk-vnc-python-0:0.7.0-2.el7
  • gtk-vnc2-0:0.7.0-2.el7
  • gtk-vnc2-devel-0:0.7.0-2.el7
  • gvnc-0:0.7.0-2.el7
  • gvnc-devel-0:0.7.0-2.el7
  • gvnc-tools-0:0.7.0-2.el7
  • gvncpulse-0:0.7.0-2.el7
  • gvncpulse-devel-0:0.7.0-2.el7
refmap via4
bid 96016
confirm
fedora FEDORA-2017-ab04a91edd
mlist
  • [oss-security] 20170203 CVE request for two input validation flaws in gtk-vnc
  • [oss-security] 20170204 Re: CVE request for two input validation flaws in gtk-vnc
Last major update 05-01-2018 - 02:31
Published 28-02-2017 - 18:59
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