A vulnerability was discovered in mosquitto, a MQTT version 3.1/3.1.1 compatible message broker, allowing a malicious MQTT client to cause a denial of service (stack overflow and daemon crash), by sending a specially crafted SUBSCRIBE packet containing a topic with a extremely deep hierarchy.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4570. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('compat.inc');
if (description)
{
script_id(131087);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/11");
script_cve_id("CVE-2019-11779");
script_xref(name:"DSA", value:"4570");
script_name(english:"Debian DSA-4570-1 : mosquitto - security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
script_set_attribute(attribute:"description", value:
"A vulnerability was discovered in mosquitto, a MQTT version 3.1/3.1.1
compatible message broker, allowing a malicious MQTT client to cause a
denial of service (stack overflow and daemon crash), by sending a
specially crafted SUBSCRIBE packet containing a topic with a extremely
deep hierarchy.");
script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=940654");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/mosquitto");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/mosquitto");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2019/dsa-4570");
script_set_attribute(attribute:"solution", value:
"Upgrade the mosquitto packages.
For the stable distribution (buster), this problem has been fixed in
version 1.5.7-1+deb10u1.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:L/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:"cvss_score_source", value:"CVE-2019-11779");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/19");
script_set_attribute(attribute:"patch_publication_date", value:"2019/11/17");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/18");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:mosquitto");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
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:"10.0", prefix:"libmosquitto-dev", reference:"1.5.7-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"libmosquitto1", reference:"1.5.7-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"libmosquittopp-dev", reference:"1.5.7-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"libmosquittopp1", reference:"1.5.7-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"mosquitto", reference:"1.5.7-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"mosquitto-clients", reference:"1.5.7-1+deb10u1")) flag++;
if (deb_check(release:"10.0", prefix:"mosquitto-dev", reference:"1.5.7-1+deb10u1")) 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");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | mosquitto | p-cpe:/a:debian:debian_linux:mosquitto |
debian | debian_linux | 10.0 | cpe:/o:debian:debian_linux:10.0 |