Vulnerabilities > CVE-2014-9984 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in GNU Glibc

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
gnu
CWE-119
critical
nessus
NVD
Published: 2017-06-12
Updated: 2023-11-07

Summary

nscd in the GNU C Library (aka glibc or libc6) before version 2.20 does not correctly compute the size of an internal buffer when processing netgroup requests, possibly leading to an nscd daemon crash or code execution as the user running nscd.

Vulnerable Configurations

Part Description Count
Application
Gnu
110

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familySuSE Local Security Checks
NASL idSUSE_SU-2018-0076-1.NASL
descriptionThis update for glibc fixes the following issues : - A privilege escalation bug in the realpath() function has been fixed. [CVE-2018-1000001, bsc#1074293] - A buffer manipulation vulnerability in nscd has been fixed that could possibly have lead to an nscd daemon crash or code execution as the user running nscd. [CVE-2014-9984, bsc#1043984] Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
last seen2020-06-01
modified2020-06-02
plugin id106046
published2018-01-15
reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/106046
titleSUSE SLES12 Security Update : glibc (SUSE-SU-2018:0076-1)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:0076-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(106046);
  script_version("1.8");
  script_cvs_date("Date: 2019/09/10 13:51:46");

  script_cve_id("CVE-2014-9984", "CVE-2018-1000001");

  script_name(english:"SUSE SLES12 Security Update : glibc (SUSE-SU-2018:0076-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for glibc fixes the following issues :

  - A privilege escalation bug in the realpath() function
    has been fixed. [CVE-2018-1000001, bsc#1074293]

  - A buffer manipulation vulnerability in nscd has been
    fixed that could possibly have lead to an nscd daemon
    crash or code execution as the user running nscd.
    [CVE-2014-9984, bsc#1043984]

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1043984"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1074293"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2014-9984/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-1000001/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20180076-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?9b2a8e7b"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-2018-54=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'glibc "realpath()" Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc-devel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc-locale");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc-locale-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:glibc-profile");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:nscd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:nscd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP0", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-debuginfo-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-debugsource-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-devel-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-devel-debuginfo-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-locale-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-locale-debuginfo-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-profile-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"nscd-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"nscd-debuginfo-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-32bit-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-debuginfo-32bit-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-devel-32bit-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-devel-debuginfo-32bit-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-locale-32bit-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-locale-debuginfo-32bit-2.19-22.24.5")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"glibc-profile-32bit-2.19-22.24.5")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "glibc");
}

Packetstorm

References