Vulnerabilities > CVE-2017-9993 - Information Exposure vulnerability in multiple products

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
low complexity
ffmpeg
debian
CWE-200
nessus
NVD
Published: 2017-06-28
Updated: 2019-03-26

Summary

FFmpeg before 2.8.12, 3.0.x and 3.1.x before 3.1.9, 3.2.x before 3.2.6, and 3.3.x before 3.3.2 does not properly restrict HTTP Live Streaming filename extensions and demuxer names, which allows attackers to read arbitrary files via crafted playlist data.

Vulnerable Configurations

Part Description Count
Application
Ffmpeg
299
OS
Debian
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3957.NASL
    descriptionSeveral vulnerabilities have been discovered in FFmpeg, a multimedia player, server and encoder. These issues could lead to Denial-of-Service and, in some situation, the execution of arbitrary code. - CVE-2017-9608 Yihan Lian of Qihoo 360 GearTeam discovered a NULL pointer access when parsing a crafted MOV file. - CVE-2017-9993 Thierry Foucu discovered that it was possible to leak information from files and symlinks ending in common multimedia extensions, using the HTTP Live Streaming. - CVE-2017-11399 Liu Bingchang of IIE discovered an integer overflow in the APE decoder that can be triggered by a crafted APE file. - CVE-2017-11665 JunDong Xie of Ant-financial Light-Year Security Lab discovered that an attacker able to craft a RTMP stream can crash FFmpeg. - CVE-2017-11719 Liu Bingchang of IIE discovered an out-of-bound access that can be triggered by a crafted DNxHD file.
    last seen2020-06-01
    modified2020-06-02
    plugin id102807
    published2017-08-29
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102807
    titleDebian DSA-3957-1 : ffmpeg - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-3957. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102807);
  script_version("3.3");
  script_cvs_date("Date: 2018/11/10 11:49:38");

  script_cve_id("CVE-2017-11399", "CVE-2017-11665", "CVE-2017-11719", "CVE-2017-9608", "CVE-2017-9993");
  script_xref(name:"DSA", value:"3957");

  script_name(english:"Debian DSA-3957-1 : ffmpeg - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several vulnerabilities have been discovered in FFmpeg, a multimedia
player, server and encoder. These issues could lead to
Denial-of-Service and, in some situation, the execution of arbitrary
code.

  - CVE-2017-9608
    Yihan Lian of Qihoo 360 GearTeam discovered a NULL
    pointer access when parsing a crafted MOV file.

  - CVE-2017-9993
    Thierry Foucu discovered that it was possible to leak
    information from files and symlinks ending in common
    multimedia extensions, using the HTTP Live Streaming.

  - CVE-2017-11399
    Liu Bingchang of IIE discovered an integer overflow in
    the APE decoder that can be triggered by a crafted APE
    file.

  - CVE-2017-11665
    JunDong Xie of Ant-financial Light-Year Security Lab
    discovered that an attacker able to craft a RTMP stream
    can crash FFmpeg.

  - CVE-2017-11719
    Liu Bingchang of IIE discovered an out-of-bound access
    that can be triggered by a crafted DNxHD file."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2017-9608"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2017-9993"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2017-11399"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2017-11665"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2017-11719"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/ffmpeg"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2017/dsa-3957"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the ffmpeg packages.

For the stable distribution (stretch), these problems have been fixed
in version 7:3.2.7-1~deb9u1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ffmpeg");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 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:"9.0", prefix:"ffmpeg", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"ffmpeg-doc", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libav-tools", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavcodec-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavcodec-extra", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavcodec-extra57", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavcodec57", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavdevice-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavdevice57", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavfilter-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavfilter-extra", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavfilter-extra6", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavfilter6", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavformat-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavformat57", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavresample-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavresample3", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavutil-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libavutil55", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libpostproc-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libpostproc54", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libswresample-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libswresample2", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libswscale-dev", reference:"7:3.2.7-1~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libswscale4", reference:"7:3.2.7-1~deb9u1")) 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");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1630.NASL
    descriptionSeveral security vulnerabilities were corrected in the libav multimedia library which may lead to a denial of service, information disclosure or the execution of arbitrary code if a malformed file is processed. CVE-2017-9993 Libav does not properly restrict HTTP Live Streaming filename extensions and demuxer names, which allows attackers to read arbitrary files via crafted playlist data. CVE-2017-9994 libavcodec/webp.c in Libav does not ensure that pix_fmt is set, which allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted file, related to the vp8_decode_mb_row_no_filter and pred8x8_128_dc_8_c functions. CVE-2017-14055 denial of service in mv_read_header() due to lack of an EOF (End of File) check might cause huge CPU and memory consumption. CVE-2017-14056 denial of service in rl2_read_header() due to lack of an EOF (End of File) check might cause huge CPU and memory consumption. CVE-2017-14057 denial of service in asf_read_marker() due to lack of an EOF (End of File) check might cause huge CPU and memory consumption. CVE-2017-14170 denial of service in mxf_read_index_entry_array() due to lack of an EOF (End of File) check might cause huge CPU consumption. CVE-2017-14171 denial of service in nsv_parse_NSVf_header() due to lack of an EOF (End of File) check might cause huge CPU consumption. CVE-2017-14767 The sdp_parse_fmtp_config_h264 function in libavformat/rtpdec_h264.c mishandles empty sprop-parameter-sets values, which allows remote attackers to cause a denial of service (heap buffer overflow) or possibly have unspecified other impact via a crafted sdp file. CVE-2017-15672 The read_header function in libavcodec/ffv1dec.c allows remote attackers to have unspecified impact via a crafted MP4 file, which triggers an out-of-bounds read. CVE-2017-17130 The ff_free_picture_tables function in libavcodec/mpegpicture.c allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted file, related to vc1_decode_i_blocks_adv. CVE-2018-6621 The decode_frame function in libavcodec/utvideodec.c in Libav allows remote attackers to cause a denial of service (out of array read) via a crafted AVI file. CVE-2018-7557 The decode_init function in libavcodec/utvideodec.c in Libav allows remote attackers to cause a denial of service (Out of array read) via an AVI file with crafted dimensions within chroma subsampling data. CVE-2018-14394 libavformat/movenc.c in Libav allows attackers to cause a denial of service (application crash caused by a divide-by-zero error) with a user crafted Waveform audio file. CVE-2018-1999010 Libav contains multiple out of array access vulnerabilities in the mms protocol that can result in attackers accessing out of bound data. For Debian 8
    last seen2020-03-17
    modified2019-01-08
    plugin id120988
    published2019-01-08
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120988
    titleDebian DLA-1630-1 : libav security update

References