CVE-2015-3202

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    CVE-2015-3202

    Published: 2 Jul 2015Last Modified: 16 Apr 2026

    Summary:

    Details: fusermount in FUSE before 2.9.3-15 does not properly clear the environment before invoking (1) mount or (2) umount as root, which allows local users to write to arbitrary files via a crafted LIBMOUNT_MTAB environment variable that is used by mount's debugging feature.

    References: http://www.debian.org/security/2015/dsa-3266, http://www.debian.org/security/2015/dsa-3268, http://www.ubuntu.com/usn/USN-2617-1, http://www.ubuntu.com/usn/USN-2617-2, http://www.ubuntu.com/usn/USN-2617-3, https://security.gentoo.org/glsa/201603-04, https://security.gentoo.org/glsa/201701-19, http://www.openwall.com/lists/oss-security/2015/05/21/9, https://gist.github.com/taviso/ecb70eb12d461dd85cba, http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159298.html, http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159543.html, http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159683.html, http://lists.fedoraproject.org/pipermail/package-announce/2015-June/159831.html, http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160094.html, http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160106.html, http://lists.opensuse.org/opensuse-updates/2015-06/msg00005.html, http://lists.opensuse.org/opensuse-updates/2015-06/msg00007.html, http://packetstormsecurity.com/files/132021/Fuse-Local-Privilege-Escalation.html, http://www.securityfocus.com/bid/74765, http://www.securitytracker.com/id/1032386, https://twitter.com/taviso/status/601370527437967360, https://www.exploit-db.com/exploits/37089/

    Affected packages

    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