Vulnerabilities > CVE-2018-20360 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in multiple products

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL

Summary

An invalid memory address dereference was discovered in the sbr_process_channel function of libfaad/sbr_dec.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The vulnerability causes a segmentation fault and application crash, which leads to denial of service.

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 familyDebian Local Security Checks
NASL idDEBIAN_DLA-1899.NASL
descriptionMultiple vulnerabilities have been discovered in faad2, the Freeware Advanced Audio Coder : CVE-2018-19502 Heap buffer overflow in the function excluded_channels (libfaad/syntax.c). This vulnerability might allow remote attackers to cause denial of service via crafted MPEG AAC data. CVE-2018-20196 Stack buffer overflow in the function calculate_gain (libfaad/br_hfadj.c). This vulnerability might allow remote attackers to cause denial of service or any unspecified impact via crafted MPEG AAC data. CVE-2018-20199 CVE-2018-20360 NULL pointer dereference in the function ifilter_bank (libfaad/filtbank.c). This vulnerability might allow remote attackers to cause denial of service via crafted MPEG AAC data. CVE-2019-6956 Global buffer overflow in the function ps_mix_phase (libfaad/ps_dec.c). This vulnerability might allow remote attackers to cause denial of service or any other unspecified impact via crafted MPEG AAC data. CVE-2019-15296 Buffer overflow in the function faad_resetbits (libfaad/bits.c). This vulnerability might allow remote attackers to cause denial of service via crafted MPEG AAC data. For Debian 8
last seen2020-06-01
modified2020-06-02
plugin id128305
published2019-08-29
reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/128305
titleDebian DLA-1899-1 : faad2 security update
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1899-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(128305);
  script_version("1.2");
  script_cvs_date("Date: 2019/12/31");

  script_cve_id("CVE-2018-19502", "CVE-2018-20196", "CVE-2018-20199", "CVE-2018-20360", "CVE-2019-15296", "CVE-2019-6956");

  script_name(english:"Debian DLA-1899-1 : faad2 security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple vulnerabilities have been discovered in faad2, the Freeware
Advanced Audio Coder :

CVE-2018-19502

Heap buffer overflow in the function excluded_channels
(libfaad/syntax.c). This vulnerability might allow remote attackers to
cause denial of service via crafted MPEG AAC data.

CVE-2018-20196

Stack buffer overflow in the function calculate_gain
(libfaad/br_hfadj.c). This vulnerability might allow remote attackers
to cause denial of service or any unspecified impact via crafted MPEG
AAC data.

CVE-2018-20199 CVE-2018-20360

NULL pointer dereference in the function ifilter_bank
(libfaad/filtbank.c). This vulnerability might allow remote attackers
to cause denial of service via crafted MPEG AAC data.

CVE-2019-6956

Global buffer overflow in the function ps_mix_phase
(libfaad/ps_dec.c). This vulnerability might allow remote attackers to
cause denial of service or any other unspecified impact via crafted
MPEG AAC data.

CVE-2019-15296

Buffer overflow in the function faad_resetbits (libfaad/bits.c). This
vulnerability might allow remote attackers to cause denial of service
via crafted MPEG AAC data.

For Debian 8 'Jessie', these problems have been fixed in version
2.7-8+deb8u3.

We recommend that you upgrade your faad2 packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2019/08/msg00033.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/faad2"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:faad");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:faad2-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libfaad-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libfaad2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/11/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/29");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"faad", reference:"2.7-8+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"faad2-dbg", reference:"2.7-8+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libfaad-dev", reference:"2.7-8+deb8u3")) flag++;
if (deb_check(release:"8.0", prefix:"libfaad2", reference:"2.7-8+deb8u3")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");