CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
90.8%
Several vulnerabilities were discovered in coturn, a TURN and STUN server for VoIP.
CVE-2020-4067 Felix Doerre reported that the STUN response buffer was not properly initialised, which could allow an attacker to leak bytes in the padding bytes from the connection of another client.
CVE-2020-6061 Aleksandar Nikolic reported that a crafted HTTP POST request can lead to information leaks and other misbehavior.
CVE-2020-6062 Aleksandar Nikolic reported that a crafted HTTP POST request can lead to server crash and denial of service.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4711. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('compat.inc');
if (description)
{
script_id(137888);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/05");
script_cve_id("CVE-2020-4067", "CVE-2020-6061", "CVE-2020-6062");
script_xref(name:"DSA", value:"4711");
script_name(english:"Debian DSA-4711-1 : coturn - security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
script_set_attribute(attribute:"description", value:
"Several vulnerabilities were discovered in coturn, a TURN and STUN
server for VoIP.
- CVE-2020-4067
Felix Doerre reported that the STUN response buffer was
not properly initialised, which could allow an attacker
to leak bytes in the padding bytes from the connection
of another client.
- CVE-2020-6061
Aleksandar Nikolic reported that a crafted HTTP POST
request can lead to information leaks and other
misbehavior.
- CVE-2020-6062
Aleksandar Nikolic reported that a crafted HTTP POST
request can lead to server crash and denial of service.");
script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=951876");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-4067");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-6061");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-6062");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/coturn");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/coturn");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/coturn");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2020/dsa-4711");
script_set_attribute(attribute:"solution", value:
"Upgrade the coturn packages.
For the oldstable distribution (stretch), these problems have been
fixed in version 4.5.0.5-1+deb9u2.
For the stable distribution (buster), these problems have been fixed
in version 4.5.1.1-1.1+deb10u1.");
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:POC/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:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-6061");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/19");
script_set_attribute(attribute:"patch_publication_date", value:"2020/06/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/30");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:coturn");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
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) 2020-2024 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:"coturn", reference:"4.5.1.1-1.1+deb10u1")) flag++;
if (deb_check(release:"9.0", prefix:"coturn", reference:"4.5.0.5-1+deb9u2")) 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");
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4067
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6061
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6062
bugs.debian.org/cgi-bin/bugreport.cgi?bug=951876
packages.debian.org/source/buster/coturn
packages.debian.org/source/stretch/coturn
security-tracker.debian.org/tracker/CVE-2020-4067
security-tracker.debian.org/tracker/CVE-2020-6061
security-tracker.debian.org/tracker/CVE-2020-6062
security-tracker.debian.org/tracker/source-package/coturn
www.debian.org/security/2020/dsa-4711
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
90.8%