Alerts This Week
Warning Icon 1 727
Alerts This Week
Warning Icon 1 727

Red Hat Enterprise Linux 7 RHSA-2020:3875-01 Moderate: tigervnc Issues

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
A security notice for tigervnc update in Red Hat Enterprise Linux 7 targeting moderate level vulnerabilities.
An update for tigervnc is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.
Security Fix(es):
* tigervnc: Stack use-after-return due to incorrect usage of stack memory in ZRLEDecoder (CVE-2019-15691)
* tigervnc: Heap buffer overflow triggered from CopyRectDecoder due to incorrect value checks (CVE-2019-15692)
* tigervnc: Heap buffer overflow in TightDecoder::FilterGradient (CVE-2019-15693)
* tigervnc: Heap buffer overflow in DecodeManager::decodeRect (CVE-2019-15694)
* tigervnc: Stack buffer overflow in CMsgReader::readSetCursor (CVE-2019-15695)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate security update buffer overflow Red Hat Enterprise Linux stack overflow tigervnc

References

https://access.redhat.com/security/cve/CVE-2019-15691 https://access.redhat.com/security/cve/CVE-2019-15692 https://access.redhat.com/security/cve/CVE-2019-15693 https://access.redhat.com/security/cve/CVE-2019-15694 https://access.redhat.com/security/cve/CVE-2019-15695 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: tigervnc-1.8.0-21.el7.src.rpm
noarch: tigervnc-icons-1.8.0-21.el7.noarch.rpm tigervnc-license-1.8.0-21.el7.noarch.rpm
x86_64: tigervnc-1.8.0-21.el7.x86_64.rpm tigervnc-debuginfo-1.8.0-21.el7.x86_64.rpm tigervnc-server-1.8.0-21.el7.x86_64.rpm tigervnc-server-minimal-1.8.0-21.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch: tigervnc-server-applet-1.8.0-21.el7.noarch.rpm
x86_64: tigervnc-debuginfo-1.8.0-21.el7.x86_64.rpm tigervnc-server-module-1.8.0-21.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: tigervnc-1.8.0-21.el7.src.rpm
noarch: tigervnc-license-1.8.0-21.el7.noarch.rpm
x86_64: tigervnc-debuginfo-1.8.0-21.el7.x86_64.rpm tigervnc-server-minimal-1.8.0-21.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch: tigervnc-icons-1.8.0-21.el7.noarch.rpm tigervnc-server-applet-1.8.0-21.el7.noarch.rpm
x86_64: tigervnc-1.8.0-21.el7.x86_64.rpm tigervnc-debuginfo-1.8.0-21.el7.x86_64.rpm tigervnc-server-1.8.0-21.el7.x86_64.rpm tigervnc-server-module-1.8.0-21.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: tigervnc-1.8.0-21.el7.src.rpm
noarch: tigervnc-icons-1.8.0-21.el7.noarch.rpm tigervnc-license-1.8.0-21.el7.noarch.rpm
ppc64: tigervnc-1.8.0-21.el7.ppc64.rpm

Read the Full Advisory


Advisory ID: RHSA-2020:3875-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3875
Issue date: 2020-09-29

Topic

An update for tigervnc is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security update buffer overflow Red Hat Enterprise Linux stack overflow tigervnc

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64

Bugs Fixed

1789527 - CVE-2019-15692 tigervnc: Heap buffer overflow triggered from CopyRectDecoder due to incorrect value checks

1789908 - CVE-2019-15691 tigervnc: Stack use-after-return due to incorrect usage of stack memory in ZRLEDecoder

1790313 - CVE-2019-15693 tigervnc: Heap buffer overflow in TightDecoder::FilterGradient

1790315 - CVE-2019-15694 tigervnc: Heap buffer overflow in DecodeManager::decodeRect

1790318 - CVE-2019-15695 tigervnc: Stack buffer overflow in CMsgReader::readSetCursor

1791996 - TigerVNC should not arbitrarily start on unspecified ports

1826822 - TigerVNC exits at startup

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here