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    CVE-2018-7225

    An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.

    Published:Feb 18, 2018
    Last Modified:Nov 21, 2024
    EPS:Feb 19, 2018
    EPSS Score:0.03567
    CVSS Score:9.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Libvncserver Project
    Product
    Libvncserver
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation

    Exploits

    http://www.openwall.com/lists/oss-security/2018/02/18/1http://www.openwall.com/lists/oss-security/2018/02/18/1

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-100 Overflow Buffers
    CAPEC-256 SOAP Array Overflow
    CAPEC-92 Forced Integer Overflow

    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

    http://www.openwall.com/lists/oss-security/2018/02/18/1
    http://www.securityfocus.com/bid/103107
    https://access.redhat.com/errata/RHSA-2018:1055
    https://github.com/LibVNC/libvncserver/issues/218
    https://lists.debian.org/debian-lts-announce/2018/03/msg00035.html
    https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
    https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
    https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
    https://security.gentoo.org/glsa/201908-05
    https://usn.ubuntu.com/3618-1/
    https://usn.ubuntu.com/4547-1/
    https://usn.ubuntu.com/4573-1/
    https://usn.ubuntu.com/4587-1/
    https://www.debian.org/security/2018/dsa-4221
    http://www.openwall.com/lists/oss-security/2018/02/18/1
    http://www.securityfocus.com/bid/103107
    https://access.redhat.com/errata/RHSA-2018:1055
    https://github.com/LibVNC/libvncserver/issues/218
    https://lists.debian.org/debian-lts-announce/2018/03/msg00035.html
    https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
    https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
    https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
    https://security.gentoo.org/glsa/201908-05
    https://usn.ubuntu.com/3618-1/
    https://usn.ubuntu.com/4547-1/
    https://usn.ubuntu.com/4573-1/
    https://usn.ubuntu.com/4587-1/
    https://www.debian.org/security/2018/dsa-4221

    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