CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
EPSS
Percentile
71.7%
Multiple directory traversal vulnerabilities in pam_timestamp.c in the pam_timestamp module for Linux-PAM (aka pam) 1.1.8 allow local users to create aribitrary files or possibly bypass authentication via a โฆ
(dot dot) in the (1) PAM_RUSER value to the get_ruser function or (2) PAM_TTY value to the check_tty funtion, which is used by the format_timestamp_name function.
The pam_userdb module for Pam uses a case-insensitive method to compare hashed passwords, which makes it easier for attackers to guess the password via a brute-force attack.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2014-354.
#
include("compat.inc");
if (description)
{
script_id(78297);
script_version("1.3");
script_cvs_date("Date: 2018/04/18 15:09:35");
script_cve_id("CVE-2013-7041", "CVE-2014-2583");
script_xref(name:"ALAS", value:"2014-354");
script_name(english:"Amazon Linux AMI : pam (ALAS-2014-354)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Amazon Linux AMI host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"Multiple directory traversal vulnerabilities in pam_timestamp.c in the
pam_timestamp module for Linux-PAM (aka pam) 1.1.8 allow local users
to create aribitrary files or possibly bypass authentication via a ..
(dot dot) in the (1) PAM_RUSER value to the get_ruser function or (2)
PAM_TTY value to the check_tty funtion, which is used by the
format_timestamp_name function.
The pam_userdb module for Pam uses a case-insensitive method to
compare hashed passwords, which makes it easier for attackers to guess
the password via a brute-force attack."
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2014-354.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update pam' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:pam");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:pam-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:pam-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2014/06/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/10/12");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2014-2018 Tenable Network Security, Inc.");
script_family(english:"Amazon Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (rpm_check(release:"ALA", reference:"pam-1.1.8-9.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"pam-debuginfo-1.1.8-9.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"pam-devel-1.1.8-9.29.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
else security_warning(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "pam / pam-debuginfo / pam-devel");
}