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CVE-2018-20023

Status Candidate

Overview

LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR

Related Files

Ubuntu Security Notice USN-4587-1
Posted Oct 21, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4587-1 - Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors and didn't check malloc return values. A remote attacker could use these issues to cause a denial of service or possibly execute arbitrary code. Josef Gajdusek discovered that iTALC had heap-based buffer overflow vulnerabilities. A remote attacker could used these issues to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, overflow, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-6051, CVE-2014-6055, CVE-2018-20019, CVE-2018-20020, CVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20750, CVE-2019-15681
SHA-256 | 852e2ad5f87cab236b79c9a3c921691e530d13ce804213bb2268c40edc71dc2c
Ubuntu Security Notice USN-4547-1
Posted Sep 28, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4547-1 - It was discovered that an information disclosure vulnerability existed in the LibVNCServer vendored in iTALC when sending a ServerCutText message. An attacker could possibly use this issue to expose sensitive information. It was discovered that the LibVNCServer and LibVNCClient vendored in iTALC incorrectly handled certain packet lengths. A remote attacker could possibly use this issue to obtain sensitive information, cause a denial of service, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, info disclosure
systems | linux, ubuntu
advisories | CVE-2018-15127, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-20749, CVE-2018-7225, CVE-2019-15681
SHA-256 | e4c50aa2b1573b7262150b8b4b002ebcb5cceb0ae668df08c6e6bc1f95f45750
Gentoo Linux Security Advisory 201908-05
Posted Aug 9, 2019
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201908-5 - Multiple vulnerabilities have been found in LibVNCServer, the worst of which could result in the arbitrary execution of code. Versions less than 0.9.12 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-7225, CVE-2018-7226
SHA-256 | 6d1f5188e6497480c4deb3a3df963be2010e2c3b629e2e4e80e06d95103650a7
Debian Security Advisory 4383-1
Posted Feb 5, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4383-1 - Pavel Cheremushkin discovered several vulnerabilities in libvncserver, a library to implement VNC server/client functionalities, which might result in the execution of arbitrary code, denial of service or information disclosure.

tags | advisory, denial of service, arbitrary, vulnerability, info disclosure
systems | linux, debian
advisories | CVE-2018-15126, CVE-2018-15127, CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-6307
SHA-256 | 15aa8b5caceabb75fc63852264b9817afd4fa46634c3111f68f5a5c122748e09
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