Vulnerabilities > CVE-2019-13161 - NULL Pointer Dereference vulnerability in multiple products

047910
CVSS 3.5 - LOW
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
SINGLE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
digium
debian
CWE-476
nessus

Summary

An issue was discovered in Asterisk Open Source through 13.27.0, 14.x and 15.x through 15.7.2, and 16.x through 16.4.0, and Certified Asterisk through 13.21-cert3. A pointer dereference in chan_sip while handling SDP negotiation allows an attacker to crash Asterisk when handling an SDP answer to an outgoing T.38 re-invite. To exploit this vulnerability an attacker must cause the chan_sip module to send a T.38 re-invite request to them. Upon receipt, the attacker must send an SDP answer containing both a T.38 UDPTL stream and another media stream containing only a codec (which is not permitted according to the chan_sip configuration).

Vulnerable Configurations

Part Description Count
Application
Digium
401
OS
Debian
2

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-2017.NASL
    descriptionThe backport of the CVE-2019-13161 fix caused a regression and has been reverted. For Debian 8
    last seen2020-06-01
    modified2020-06-02
    plugin id131435
    published2019-12-03
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/131435
    titleDebian DLA-2017-2 : asterisk regression update
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Debian Security Advisory DLA-2017-2. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(131435);
      script_version("1.1");
      script_cvs_date("Date: 2019/12/03");
    
      script_name(english:"Debian DLA-2017-2 : asterisk regression 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:
    "The backport of the CVE-2019-13161 fix caused a regression and has
    been reverted.
    
    For Debian 8 'Jessie', this problem has been fixed in version
    1:11.13.1~dfsg-2+deb8u8.
    
    We recommend that you upgrade your asterisk 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/2019/12/msg00000.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/jessie/asterisk"
      );
      script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
      script_set_attribute(attribute:"risk_factor", value:"High");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-config");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-dahdi");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-dbg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-dev");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-doc");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-mobile");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-modules");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-mp3");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-mysql");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-ooh323");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-voicemail");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-voicemail-imapstorage");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-voicemail-odbcstorage");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk-vpb");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/01");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/12/01");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/03");
      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:"asterisk", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-config", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-dahdi", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-dbg", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-dev", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-doc", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-mobile", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-modules", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-mp3", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-mysql", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-ooh323", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-voicemail", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-voicemail-imapstorage", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-voicemail-odbcstorage", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    if (deb_check(release:"8.0", prefix:"asterisk-vpb", reference:"1:11.13.1~dfsg-2+deb8u8")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
      else security_hole(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_E9D2E981A46D11E9BED9001999F8D30B.NASL
    descriptionThe Asterisk project reports : When T.38 faxing is done in Asterisk a T.38 reinvite may be sent to an endpoint to switch it to T.38. If the endpoint responds with an improperly formatted SDP answer including both a T.38 UDPTL stream and an audio or video stream containing only codecs not allowed on the SIP peer or user a crash will occur. The code incorrectly assumes that there will be at least one common codec when T.38 is also in the SDP answer.
    last seen2020-06-01
    modified2020-06-02
    plugin id126668
    published2019-07-15
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/126668
    titleFreeBSD : asterisk -- Remote Crash Vulnerability in chan_sip channel driver (e9d2e981-a46d-11e9-bed9-001999f8d30b)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from the FreeBSD VuXML database :
    #
    # Copyright 2003-2020 Jacques Vidrine and contributors
    #
    # Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
    # HTML, PDF, PostScript, RTF and so forth) with or without modification,
    # are permitted provided that the following conditions are met:
    # 1. Redistributions of source code (VuXML) must retain the above
    #    copyright notice, this list of conditions and the following
    #    disclaimer as the first lines of this file unmodified.
    # 2. Redistributions in compiled form (transformed to other DTDs,
    #    published online in any format, converted to PDF, PostScript,
    #    RTF and other formats) must reproduce the above copyright
    #    notice, this list of conditions and the following disclaimer
    #    in the documentation and/or other materials provided with the
    #    distribution.
    # 
    # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
    # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
    # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
    # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
    # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
    # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
    # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
    # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
    # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
    # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(126668);
      script_version("1.3");
      script_cvs_date("Date: 2020/01/08");
    
      script_cve_id("CVE-2019-13161");
    
      script_name(english:"FreeBSD : asterisk -- Remote Crash Vulnerability in chan_sip channel driver (e9d2e981-a46d-11e9-bed9-001999f8d30b)");
      script_summary(english:"Checks for updated packages in pkg_info output");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote FreeBSD host is missing one or more security-related
    updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The Asterisk project reports :
    
    When T.38 faxing is done in Asterisk a T.38 reinvite may be sent to an
    endpoint to switch it to T.38. If the endpoint responds with an
    improperly formatted SDP answer including both a T.38 UDPTL stream and
    an audio or video stream containing only codecs not allowed on the SIP
    peer or user a crash will occur. The code incorrectly assumes that
    there will be at least one common codec when T.38 is also in the SDP
    answer."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://downloads.asterisk.org/pub/security/AST-2019-003.html"
      );
      # https://vuxml.freebsd.org/freebsd/e9d2e981-a46d-11e9-bed9-001999f8d30b.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?9922ccf7"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:N/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/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:freebsd:freebsd:asterisk13");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:asterisk15");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:asterisk16");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/28");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/07/12");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/15");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"FreeBSD Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("freebsd_package.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
    if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (pkg_test(save_report:TRUE, pkg:"asterisk13<13.27.1")) flag++;
    if (pkg_test(save_report:TRUE, pkg:"asterisk15<15.7.3")) flag++;
    if (pkg_test(save_report:TRUE, pkg:"asterisk16<16.4.1")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_note(port:0, extra:pkg_report_get());
      else security_note(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");