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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.1356 tigervnc security update 17 April 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: tigervnc Publisher: Red Hat Operating System: Red Hat Enterprise Linux WS/Desktop 8 Red Hat Enterprise Linux Server 8 Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-15695 CVE-2019-15694 CVE-2019-15693 CVE-2019-15692 CVE-2019-15691 Reference: ESB-2020.0362 ESB-2020.0176 Original Bulletin: https://access.redhat.com/errata/RHSA-2020:1497 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: tigervnc security update Advisory ID: RHSA-2020:1497-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2020:1497 Issue date: 2020-04-16 CVE Names: CVE-2019-15691 CVE-2019-15692 CVE-2019-15693 CVE-2019-15694 CVE-2019-15695 ===================================================================== 1. Summary: An update for tigervnc is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux AppStream (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64 3. Description: 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. 4. 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 5. Bugs fixed (https://bugzilla.redhat.com/): 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 6. Package List: Red Hat Enterprise Linux AppStream (v. 8): Source: tigervnc-1.9.0-14.el8_1.src.rpm aarch64: tigervnc-1.9.0-14.el8_1.aarch64.rpm tigervnc-debuginfo-1.9.0-14.el8_1.aarch64.rpm tigervnc-debugsource-1.9.0-14.el8_1.aarch64.rpm tigervnc-server-1.9.0-14.el8_1.aarch64.rpm tigervnc-server-debuginfo-1.9.0-14.el8_1.aarch64.rpm tigervnc-server-minimal-1.9.0-14.el8_1.aarch64.rpm tigervnc-server-minimal-debuginfo-1.9.0-14.el8_1.aarch64.rpm tigervnc-server-module-1.9.0-14.el8_1.aarch64.rpm tigervnc-server-module-debuginfo-1.9.0-14.el8_1.aarch64.rpm noarch: tigervnc-icons-1.9.0-14.el8_1.noarch.rpm tigervnc-license-1.9.0-14.el8_1.noarch.rpm tigervnc-server-applet-1.9.0-14.el8_1.noarch.rpm ppc64le: tigervnc-1.9.0-14.el8_1.ppc64le.rpm tigervnc-debuginfo-1.9.0-14.el8_1.ppc64le.rpm tigervnc-debugsource-1.9.0-14.el8_1.ppc64le.rpm tigervnc-server-1.9.0-14.el8_1.ppc64le.rpm tigervnc-server-debuginfo-1.9.0-14.el8_1.ppc64le.rpm tigervnc-server-minimal-1.9.0-14.el8_1.ppc64le.rpm tigervnc-server-minimal-debuginfo-1.9.0-14.el8_1.ppc64le.rpm tigervnc-server-module-1.9.0-14.el8_1.ppc64le.rpm tigervnc-server-module-debuginfo-1.9.0-14.el8_1.ppc64le.rpm s390x: tigervnc-1.9.0-14.el8_1.s390x.rpm tigervnc-debuginfo-1.9.0-14.el8_1.s390x.rpm tigervnc-debugsource-1.9.0-14.el8_1.s390x.rpm tigervnc-server-1.9.0-14.el8_1.s390x.rpm tigervnc-server-debuginfo-1.9.0-14.el8_1.s390x.rpm tigervnc-server-minimal-1.9.0-14.el8_1.s390x.rpm tigervnc-server-minimal-debuginfo-1.9.0-14.el8_1.s390x.rpm x86_64: tigervnc-1.9.0-14.el8_1.x86_64.rpm tigervnc-debuginfo-1.9.0-14.el8_1.x86_64.rpm tigervnc-debugsource-1.9.0-14.el8_1.x86_64.rpm tigervnc-server-1.9.0-14.el8_1.x86_64.rpm tigervnc-server-debuginfo-1.9.0-14.el8_1.x86_64.rpm tigervnc-server-minimal-1.9.0-14.el8_1.x86_64.rpm tigervnc-server-minimal-debuginfo-1.9.0-14.el8_1.x86_64.rpm tigervnc-server-module-1.9.0-14.el8_1.x86_64.rpm tigervnc-server-module-debuginfo-1.9.0-14.el8_1.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. 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 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2020 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBXpjJDNzjgjWX9erEAQj+Ag//SyAwdxCtsdK5rmxZtpZNrK2njDhtbVsA +xFREhxi2xqBB3lM7xzaolC/EflkPLZi5EZ4MFZtpWt9x8EcB+6KdO8gjaqxvi+j ddlja2xgF/aKuEHXVXBAmyyluXvmw+MB4Y1n1HUaHoXdYZ57uVvniqL0msuGyZbz NaiUNhzvLgLjpPfJsyVSKbCvsNvp6qNmKKIS5TrWz5sfOehmN84ZbRh/sAObLauS UovfzVww7s6Z+0DNTxCwZQcNeqy3LBVMja5iWqOOXWbqS6IfBzldJC8wVa/l4+vB VEVUX9gIE6nwbi88sFiEDN+7A9EwgDyDdLJib8rgx3W//ymBZVEckSsiJJ1NcrtR +XgmK/Ivpo55XkoiVE0rOGKgTRfZI/5fby+X6T5lwY2WjaR9SUDT+73fPvQip7RF JZqSZNAs01Ncfof5D7YkMt41y/+wRwlRPyWYbFAP4xEwiPKLkAV0eT1bY7ej94is /MYzmirdnSXfe22zV/G3sN0avz0xh8jJptMuoP1M1t6x4Y0uT72itY1bLWZRFk2U sCrDALfhFyWRm8o+5BvG5nilIqM4FU+I4HnkxCu/iPWK1J7WG8ioYIHam8gR1OTu Ty4rxYbJRyRZeQBo+G7q4dxcyv/LMutmD/vmpnEcvLvWQ3wv9EsP0Px/Atpe5ZMX MYXN5UKesb0= =jTQH - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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