The remote host is affected by the vulnerability described in GLSA-200903-39 (pam_krb5: Privilege escalation)
The following vulnerabilities were discovered:
pam_krb5 does not properly initialize the Kerberos libraries for setuid use (CVE-2009-0360).
Derek Chan reported that calls to pam_setcred() are not properly handled when running setuid (CVE-2009-0361).
Impact :
A local attacker could set an environment variable to point to a specially crafted Kerberos configuration file and launch a PAM-based setuid application to elevate privileges, or change ownership and overwrite arbitrary files.
Workaround :
There is no known workaround at this time.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200903-39.
#
# The advisory text is Copyright (C) 2001-2017 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(36027);
script_version("1.17");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
script_cve_id("CVE-2009-0360", "CVE-2009-0361");
script_bugtraq_id(33740, 33741);
script_xref(name:"GLSA", value:"200903-39");
script_name(english:"GLSA-200903-39 : pam_krb5: Privilege escalation");
script_summary(english:"Checks for updated package(s) in /var/db/pkg");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Gentoo host is missing one or more security-related
patches."
);
script_set_attribute(
attribute:"description",
value:
"The remote host is affected by the vulnerability described in GLSA-200903-39
(pam_krb5: Privilege escalation)
The following vulnerabilities were discovered:
pam_krb5
does not properly initialize the Kerberos libraries for setuid use
(CVE-2009-0360).
Derek Chan reported that calls to
pam_setcred() are not properly handled when running setuid
(CVE-2009-0361).
Impact :
A local attacker could set an environment variable to point to a
specially crafted Kerberos configuration file and launch a PAM-based
setuid application to elevate privileges, or change ownership and
overwrite arbitrary files.
Workaround :
There is no known workaround at this time."
);
script_set_attribute(
attribute:"see_also",
value:"https://security.gentoo.org/glsa/200903-39"
);
script_set_attribute(
attribute:"solution",
value:
"All pam_krb5 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=sys-auth/pam_krb5-3.12'"
);
script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_cwe_id(264, 287);
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:pam_krb5");
script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2009/03/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2009/03/27");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2009-2021 Tenable Network Security, Inc.");
script_family(english:"Gentoo Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (qpkg_check(package:"sys-auth/pam_krb5", unaffected:make_list("ge 3.12"), vulnerable:make_list("lt 3.12"))) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
else security_warning(0);
exit(0);
}
else
{
tested = qpkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "pam_krb5");
}