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Gentoo Security Advisory GLSA 201603-04

🗓️ 10 Mar 2016 00:00:00Reported by Copyright (C) 2016 Eero VolotinenType 
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Gentoo Security Advisory GLSA 201603-04 - FUSE privilege escalation via fusermoun

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Code
# SPDX-FileCopyrightText: 2016 Eero Volotinen
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.121446");
  script_version("2026-04-24T15:56:23+0000");
  script_tag(name:"creation_date", value:"2016-03-10 07:16:47 +0200 (Thu, 10 Mar 2016)");
  script_tag(name:"last_modification", value:"2026-04-24 15:56:23 +0000 (Fri, 24 Apr 2026)");
  script_name("Gentoo Security Advisory GLSA 201603-04");
  script_tag(name:"insight", value:"The fusermount binary calls setuid(geteuid()) to reset the RUID when it invokes /bin/mount so that it can use privileged mount options that are normally restricted if RUID != EUID. FUSE does not properly clear environment variables before invoking mount or umount as root allowing this to be passed to operations using elevated privileges such as LIBMOUNT_MTAB that is used by the mount commands debugging feature.");
  script_tag(name:"solution", value:"Update the affected packages to the latest available version.");
  script_tag(name:"solution_type", value:"VendorFix");
  script_xref(name:"URL", value:"https://security.gentoo.org/glsa/201603-04");
  script_cve_id("CVE-2015-3202");
  script_tag(name:"cvss_base", value:"3.6");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:N/I:P/A:P");
  script_tag(name:"qod_type", value:"package");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/gentoo", "ssh/login/pkg");
  script_category(ACT_GATHER_INFO);
  script_tag(name:"summary", value:"Gentoo Linux Local Security Checks GLSA 201603-04");
  script_copyright("Copyright (C) 2016 Eero Volotinen");
  script_family("Gentoo Local Security Checks");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-gentoo.inc");

res = "";
report = "";

if((res=ispkgvuln(pkg:"sys-fs/fuse", unaffected: make_list("ge 2.9.4"), vulnerable: make_list("lt 2.9.4"))) != NULL) {
  report += res;
}

if(report != "") {
    security_message(data:report);
} else if (__pkg_match) {
    exit(99);
}

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24 Apr 2026 00:00Current
7.2High risk
Vulners AI Score7.2
CVSS 23.6
EPSS0.01008
16