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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:133211
[Rus]
Version
1
Class
patch
ALTXid
327869
Language
English
Severity
Medium
Title
USN-4407-1 -- LibVNCServer vulnerabilities
Description
It was discovered that LibVNCServer incorrectly handled decompressing data. Anattacker could possibly use this issue to cause LibVNCServer to crash,resulting in a denial of service. (CVE-2019-15680)
Family
unix
Platform
Linux Mint 18.x
Linux Mint 19.x
Linux Mint 20.x
Ubuntu 16.04
Ubuntu 18.04
Ubuntu 19.10
Ubuntu 20.04
Product
libvncserver
Reference
VENDOR: USN-4407-1
VENDOR: USN-4407-1
Id:
USN-4407-1
Reference:
https://ubuntu.com/security/notices/USN-4407-1
CVE: CVE-2019-15680
CVE: CVE-2019-15680
Id:
CVE-2019-15680
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15680
Comment
: TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSSv3 Score:
7.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE:
476 (NULL Pointer Dereference)
References:
[oss-security] 20181210 libvnc and tightvnc vulnerabilities (MLIST)
[debian-lts-announce] 20191221 [SECURITY] [DLA 2045-1] tightvnc security update (MLIST)
USN-4407-1 (UBUNTU)
https://cert-portal.siemens.com/productcert/pdf/ssa-478893.pdf (CONFIRM)
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-08 (MISC)
CVE: CVE-2019-15681
CVE: CVE-2019-15681
Id:
CVE-2019-15681
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15681
Comment
: LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
NONE
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSSv3 Score:
7.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
NONE
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE:
665 (Improper Initialization)
References:
https://github.com/LibVNC/libvncserver/commit/d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a (MISC)
[debian-lts-announce] 20191030 [SECURITY] [DLA 1977-1] libvncserver security update (MLIST)
[debian-lts-announce] 20191030 [SECURITY] [DLA 1979-1] italc security update (MLIST)
[debian-lts-announce] 20191129 [SECURITY] [DLA 2014-1] vino security update (MLIST)
[debian-lts-announce] 20191221 [SECURITY] [DLA 2045-1] tightvnc security update (MLIST)
openSUSE-SU-2020:0624 (SUSE)
USN-4407-1 (UBUNTU)
openSUSE-SU-2020:1071 (SUSE)
USN-4547-1 (UBUNTU)
USN-4573-1 (UBUNTU)
USN-4587-1 (UBUNTU)
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf (CONFIRM)
CVE: CVE-2019-15690
CVE: CVE-2019-20788
CVE: CVE-2019-20788
Id:
CVE-2019-20788
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20788
Comment
: libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
CVSSv2 Score:
7.5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSSv3 Score:
9.8
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE:
787 (Out-of-bounds Write)
References:
https://github.com/LibVNC/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed (MISC)
openSUSE-SU-2020:0624 (SUSE)
USN-4407-1 (UBUNTU)
https://securitylab.github.com/advisories/GHSL-2020-064-libvnc-libvncclient (MISC)
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf (CONFIRM)
CVE: CVE-2017-18922
CVE: CVE-2017-18922
Id:
CVE-2017-18922
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18922
Comment
: It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
CVSSv2 Score:
7.5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSSv3 Score:
9.8
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE:
787 (Out-of-bounds Write)
References:
https://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433 (MISC)
https://www.openwall.com/lists/oss-security/2020/06/30/2 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=1852356 (MISC)
[oss-security] 20200630 Re: libvncserver: old websocket decoding patch (MLIST)
openSUSE-SU-2020:0960 (SUSE)
USN-4407-1 (UBUNTU)
openSUSE-SU-2020:0978 (SUSE)
openSUSE-SU-2020:0988 (SUSE)
openSUSE-SU-2020:1025 (SUSE)
openSUSE-SU-2020:1056 (SUSE)
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf (CONFIRM)
FEDORA-2020-37112ac660 ()
FEDORA-2020-1a4b1c8271 ()
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