ID

VAR-201812-1202

CVE

CVE-2018-20019

TITLE

LibVNC Vulnerable to out-of-bounds writing

DESCRIPTION

LibVNC before commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f contains multiple heap out-of-bound write vulnerabilities in VNC client code that can result remote code execution. LibVNC Contains an out-of-bounds vulnerability.Information is obtained, information is altered, and service operation is disrupted (DoS) There is a possibility of being put into a state. LibVNCServer is prone to an multiple heap-based buffer-overflow vulnerabilities. Attackers can exploit these issues to execute arbitrary code within the context of the user running the affected application. Failed attempts will likely cause a denial-of-service condition. Versions prior to LibVNCServer 0.9.12 are vulnerable. For the stable distribution (stretch), these problems have been fixed in version 0.9.11+dfsg-1.3~deb9u1. We recommend that you upgrade your libvncserver packages. For the detailed security status of libvncserver please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libvncserver Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAlxXVEVfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0QnFA/+OdqSdVFFyBtT3WnOMUez7pBsk3wx0rzbCZ5uBJHYzr0ogMgDInL4GwdW RrTvSQtpKiUjmN4tfocXxKiWq6/KVZ5wgfYCeIjzzSr8qQHqYnV9NH2A8bUpVFAp M04zpV/zqPd2vlUPkppigHCyemV7sRuaXikGyUYm4Y6zBEhSg2vfyqfFmoggKoq8 aD6cWtKgCW3aSALA52JlVn5cPz17xvrk1zfStgtLPjHZTMHW19fDXq1hubxfR3q1 66LEfcs+13BFZW+09/eYSsC5vM96s4AfshErjtwpMxtVnc9MEIRNfRM9kfteaRvi s60EmM7xFvbx9acIQgKnLNNyjExzjySmgO0Bq7GNBu0gK1wNVpnOHI9EtBLfjOE7 YrYOxvwyTI5jFS0Txl846/dXwxy6gcX/bTlO6mqQFUicJcr7DU4GflHrt/t15VcK e7DBeWlhzV7yBoxC5yjS37dug0Ab9A9+TpCRxD5jwMWHZ3g+/8oXybCEqpuFwrqb kS1L4op0CHvouGbRldEtFookQud5deuqbEGxScGvOr8buENpnQmc6fzDh3jMH2wZ BNUHPzIYJHKqMXCK41jUB40/0v5iz5z5gHvRYfo8+ZOoLIFCp7zER3RDxwR8fGiK tqycmFiHaax09jHvqffRbwARfVrrrNbh4u/F7n3WWpbIsCjPOC4mI2 -----END PGP SIGNATURE----- . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201908-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: LibVNCServer: Multiple vulnerabilities Date: August 09, 2019 Bugs: #659560, #673508 ID: 201908-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in LibVNCServer, the worst of which could result in the arbitrary execution of code. Background ========== LibVNCServer/LibVNCClient are cross-platform C libraries that allow you to easily implement VNC server or client functionality in your program. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-libs/libvncserver < 0.9.12 >= 0.9.12 Description =========== Multiple vulnerabilities have been discovered in LibVNCServer. Please review the CVE identifiers referenced below for details. Impact ====== Please review the referenced CVE identifiers for details. Workaround ========== There is no known workaround at this time. Resolution ========== All LibVNCServer users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-libs/libvncserver-0.9.12" References ========== [ 1 ] CVE-2018-20019 https://nvd.nist.gov/vuln/detail/CVE-2018-20019 [ 2 ] CVE-2018-20020 https://nvd.nist.gov/vuln/detail/CVE-2018-20020 [ 3 ] CVE-2018-20021 https://nvd.nist.gov/vuln/detail/CVE-2018-20021 [ 4 ] CVE-2018-20022 https://nvd.nist.gov/vuln/detail/CVE-2018-20022 [ 5 ] CVE-2018-20023 https://nvd.nist.gov/vuln/detail/CVE-2018-20023 [ 6 ] CVE-2018-20024 https://nvd.nist.gov/vuln/detail/CVE-2018-20024 [ 7 ] CVE-2018-7225 https://nvd.nist.gov/vuln/detail/CVE-2018-7225 [ 8 ] CVE-2018-7226 https://nvd.nist.gov/vuln/detail/CVE-2018-7226 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201908-05 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2019 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5 . ========================================================================= Ubuntu Security Notice USN-4587-1 October 20, 2020 italc vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Several security issues were fixed in iTALC. Software Description: - italc: didact tool which allows teachers to view and control computer labs Details: Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors and didn't check malloc return values. (CVE-2016-9941, CVE-2016-9942) It was discovered that iTALC had an out-of-bounds write, multiple heap out-of-bounds writes, an infinite loop, improper initializations, and null pointer vulnerabilities. (CVE-2018-15127, CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-7225, CVE-2019-15681) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: italc-client 1:2.0.2+dfsg1-4ubuntu0.1 italc-master 1:2.0.2+dfsg1-4ubuntu0.1 libitalccore 1:2.0.2+dfsg1-4ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/4587-1 CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055, CVE-2016-9941, CVE-2016-9942, CVE-2018-15127, CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-7225, CVE-2019-15681 Package Information: https://launchpad.net/ubuntu/+source/italc/1:2.0.2+dfsg1-4ubuntu0.1

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

buffer error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Ubuntu,Gentoo

SOURCES

LAST UPDATE DATE

2024-11-23T20:47:21.520000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE