CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS
Percentile
76.3%
It was discovered that the _unix_run_helper_binary() function of PAM’s unix_pam module could write to a blocking pipe, possibly causing the function to become unresponsive. An attacker able to supply large passwords to the unix_pam module could use this flaw to enumerate valid user accounts, or cause a denial of service on the system.
(CVE-2015-3238)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(85564);
script_version("2.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2015-3238");
script_name(english:"Scientific Linux Security Update : pam on SL6.x, SL7.x i386/x86_64 (20150818)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Scientific Linux host is missing one or more security
updates."
);
script_set_attribute(
attribute:"description",
value:
"It was discovered that the _unix_run_helper_binary() function of PAM's
unix_pam module could write to a blocking pipe, possibly causing the
function to become unresponsive. An attacker able to supply large
passwords to the unix_pam module could use this flaw to enumerate
valid user accounts, or cause a denial of service on the system.
(CVE-2015-3238)"
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1508&L=scientific-linux-errata&F=&S=&P=21406
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?4fa6c1d1"
);
script_set_attribute(
attribute:"solution",
value:"Update the affected pam, pam-debuginfo and / or pam-devel packages."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:pam");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:pam-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:pam-devel");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2015/08/24");
script_set_attribute(attribute:"patch_publication_date", value:"2015/08/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/08/20");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2015-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Scientific Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
flag = 0;
if (rpm_check(release:"SL6", reference:"pam-1.1.1-20.el6_7.1")) flag++;
if (rpm_check(release:"SL6", reference:"pam-debuginfo-1.1.1-20.el6_7.1")) flag++;
if (rpm_check(release:"SL6", reference:"pam-devel-1.1.1-20.el6_7.1")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"pam-1.1.8-12.el7_1.1")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"pam-debuginfo-1.1.8-12.el7_1.1")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"pam-devel-1.1.8-12.el7_1.1")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
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");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS
Percentile
76.3%