Debian LTS Advisory ([SECURITY] [DLA 1979-1] italc security update)

Published: 2019-10-31 03:00:34
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Summary:
The remote host is missing an update for the 'italc' Linux Distribution Package(s) announced via the DSA-1979-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
Several vulnerabilities have been identified in the VNC code of iTALC, a classroom management software. All vulnerabilities referenced below are issues that have originally been reported against Debian source Linux Distribution Package libvncserver. The italc source Linux Distribution Package in Debian ships a custom-patched version of libvncserver, thus libvncserver's security fixes required porting over. CVE-2014-6051 Integer overflow in the MallocFrameBuffer function in vncviewer.c in LibVNCServer allowed remote VNC servers to cause a denial of service (crash) and possibly executed arbitrary code via an advertisement for a large screen size, which triggered a heap-based buffer overflow. CVE-2014-6052 The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer did not check certain malloc return values, which allowed remote VNC servers to cause a denial of service (application crash) or possibly execute arbitrary code by specifying a large screen size in a (1) FramebufferUpdate, (2) ResizeFrameBuffer, or (3) PalmVNCReSizeFrameBuffer message. CVE-2014-6053 The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer did not properly handle attempts to send a large amount of ClientCutText data, which allowed remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that was processed by using a single unchecked malloc. CVE-2014-6054 The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer allowed remote attackers to cause a denial of service (divide-by-zero error and server crash) via a zero value in the scaling factor in a (1) PalmVNCSetScaleFactor or (2) SetScale message. CVE-2014-6055 Multiple stack-based buffer overflows in the File Transfer feature in rfbserver.c in LibVNCServer allowed remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a (1) long file or (2) directory name or the (3) FileTime attribute in a rfbFileTransferOffer message. CVE-2016-9941 Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer allowed remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area. CVE-2016-9942 Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer allowed remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeded what is specified by the t ... Description truncated. Please see the references for more information.

Affected Versions:
'italc' Linux Distribution Package(s) on Debian Linux.

Recommendations:
For Debian 8 'Jessie', these problems have been fixed in version 1:2.0.2+dfsg1-2+deb8u1. We recommend that you upgrade your italc Linux Distribution Packages.

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2014-6051
https://nvd.nist.gov/vuln/detail/CVE-2014-6052
https://nvd.nist.gov/vuln/detail/CVE-2014-6053
https://nvd.nist.gov/vuln/detail/CVE-2014-6054
https://nvd.nist.gov/vuln/detail/CVE-2014-6055
https://nvd.nist.gov/vuln/detail/CVE-2016-9941
https://nvd.nist.gov/vuln/detail/CVE-2016-9942
https://nvd.nist.gov/vuln/detail/CVE-2018-15126
https://nvd.nist.gov/vuln/detail/CVE-2018-15127
https://nvd.nist.gov/vuln/detail/CVE-2018-20019
https://nvd.nist.gov/vuln/detail/CVE-2018-20020
https://nvd.nist.gov/vuln/detail/CVE-2018-20021
https://nvd.nist.gov/vuln/detail/CVE-2018-20022
https://nvd.nist.gov/vuln/detail/CVE-2018-20023
https://nvd.nist.gov/vuln/detail/CVE-2018-20024
https://nvd.nist.gov/vuln/detail/CVE-2018-20748
https://nvd.nist.gov/vuln/detail/CVE-2018-20749
https://nvd.nist.gov/vuln/detail/CVE-2018-20750
https://nvd.nist.gov/vuln/detail/CVE-2018-6307
https://nvd.nist.gov/vuln/detail/CVE-2018-7225
https://nvd.nist.gov/vuln/detail/CVE-2019-15681

References:

https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
https://security-tracker.debian.org/tracker/DLA-1979-1

Severity
High
CVSS Score
7.8
Published
2019-10-31
Modified
2019-10-31
Category
Debian Local Security Checks

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