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    CVE-2018-20019

    LibVNC before commit a83439b9fbe0f03c48eb94ed05729cb016f8b72f contains multiple heap out-of-bound write vulnerabilities in VNC client code that can result remote code execution

    Published:Dec 19, 2018
    Last Modified:Nov 21, 2024
    EPS:Dec 19, 2018
    EPSS Score:0.17311
    CVSS Score:9.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Libvnc Project
    Product
    Libvncserver
    Vendor
    Siemens
    Product
    Simatic Itc1500
    Vendor
    Siemens
    Product
    Simatic Itc1500 Firmware
    Vendor
    Siemens
    Product
    Simatic Itc1500 Pro
    Vendor
    Siemens
    Product
    Simatic Itc1500 Pro Firmware
    Vendor
    Siemens
    Product
    Simatic Itc1900
    Vendor
    Siemens
    Product
    Simatic Itc1900 Firmware
    Vendor
    Siemens
    Product
    Simatic Itc1900 Pro
    Vendor
    Siemens
    Product
    Simatic Itc1900 Pro Firmware
    Vendor
    Siemens
    Product
    Simatic Itc2200
    Vendor
    Siemens
    Product
    Simatic Itc2200 Firmware
    Vendor
    Siemens
    Product
    Simatic Itc2200 Pro
    Vendor
    Siemens
    Product
    Simatic Itc2200 Pro Firmware

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
    https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-029-libvnc-multiple-heap-out-of-bound-vulnerabilities/
    https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
    https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
    https://security.gentoo.org/glsa/201908-05
    https://usn.ubuntu.com/3877-1/
    https://usn.ubuntu.com/4547-1/
    https://usn.ubuntu.com/4587-1/
    https://www.debian.org/security/2019/dsa-4383
    https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
    https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-029-libvnc-multiple-heap-out-of-bound-vulnerabilities/
    https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
    https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
    https://security.gentoo.org/glsa/201908-05
    https://usn.ubuntu.com/3877-1/
    https://usn.ubuntu.com/4547-1/
    https://usn.ubuntu.com/4587-1/
    https://www.debian.org/security/2019/dsa-4383

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High