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    CVE-2018-18556

    A privilege escalation issue was discovered in VyOS 1.1.8. The default configuration also allows operator users to execute the pppd binary with elevated (sudo) permissions. Certain input parameters are not properly validated. A malicious operator user can run the binary with elevated permissions and leverage its improper input validation condition to spawn an attacker-controlled shell with root privileges.

    Published:Dec 17, 2018
    Last Modified:Nov 21, 2024
    EPS:Dec 17, 2018
    EPSS Score:0.69794
    CVSS Score:9.9

    Affected Products

    Vendor
    Vyos
    Product
    Vyos

    Exploits

    http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.htmlhttps://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releaseshttp://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.htmlhttps://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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