CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS
Percentile
99.0%
The following packages have been upgraded to a later upstream version:
libtasn1 (4.10).
Security Fix(es) :
A heap-based buffer overflow flaw was found in the way the libtasn1 library decoded certain DER-encoded inputs.
A specially crafted DER- encoded input could cause an application using libtasn1 to perform an invalid read, causing the application to crash. (CVE-2015-3622)
A stack-based buffer overflow was found in the way libtasn1 decoded certain DER encoded data. An attacker could use this flaw to crash an application using the libtasn1 library. (CVE-2015-2806)
#%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(102647);
script_version("3.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2015-2806", "CVE-2015-3622");
script_name(english:"Scientific Linux Security Update : libtasn1 on SL7.x x86_64 (20170801)");
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:
"The following packages have been upgraded to a later upstream version:
libtasn1 (4.10).
Security Fix(es) :
- A heap-based buffer overflow flaw was found in the way
the libtasn1 library decoded certain DER-encoded inputs.
A specially crafted DER- encoded input could cause an
application using libtasn1 to perform an invalid read,
causing the application to crash. (CVE-2015-3622)
- A stack-based buffer overflow was found in the way
libtasn1 decoded certain DER encoded data. An attacker
could use this flaw to crash an application using the
libtasn1 library. (CVE-2015-2806)"
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1708&L=scientific-linux-errata&F=&S=&P=11423
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?26b56168"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libtasn1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libtasn1-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libtasn1-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:libtasn1-tools");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2015/04/10");
script_set_attribute(attribute:"patch_publication_date", value:"2017/08/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/22");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2021 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);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);
flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"libtasn1-4.10-1.el7")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"libtasn1-debuginfo-4.10-1.el7")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"libtasn1-devel-4.10-1.el7")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"libtasn1-tools-4.10-1.el7")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
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, "libtasn1 / libtasn1-debuginfo / libtasn1-devel / libtasn1-tools");
}