Several vulnerabilities were discovered in BIND, a DNS server implementation.
CVE-2020-8619 It was discovered that an asterisk character in an empty non terminal can cause an assertion failure, resulting in denial of service.
CVE-2020-8622 Dave Feldman, Jeff Warren, and Joel Cunningham reported that a truncated TSIG response can lead to an assertion failure, resulting in denial of service.
CVE-2020-8623 Lyu Chiy reported that a flaw in the native PKCS#11 code can lead to a remotely triggerable assertion failure, resulting in denial of service.
CVE-2020-8624 Joop Boonen reported that update-policy rules of type ‘subdomain’ are enforced incorrectly, allowing updates to all parts of the zone along with the intended subdomain.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4752. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include("compat.inc");
if (description)
{
script_id(139930);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/03");
script_cve_id(
"CVE-2020-8619",
"CVE-2020-8622",
"CVE-2020-8623",
"CVE-2020-8624"
);
script_xref(name:"DSA", value:"4752");
script_xref(name:"IAVA", value:"2020-A-0385-S");
script_name(english:"Debian DSA-4752-1 : bind9 - 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 were discovered in BIND, a DNS server
implementation.
- CVE-2020-8619
It was discovered that an asterisk character in an empty
non terminal can cause an assertion failure, resulting
in denial of service.
- CVE-2020-8622
Dave Feldman, Jeff Warren, and Joel Cunningham reported
that a truncated TSIG response can lead to an assertion
failure, resulting in denial of service.
- CVE-2020-8623
Lyu Chiy reported that a flaw in the native PKCS#11 code
can lead to a remotely triggerable assertion failure,
resulting in denial of service.
- CVE-2020-8624
Joop Boonen reported that update-policy rules of type
'subdomain' are enforced incorrectly, allowing updates
to all parts of the zone along with the intended
subdomain."
);
script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966497");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-8619");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-8622");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-8623");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-8624");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/bind9");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/bind9");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2020/dsa-4752");
script_set_attribute(
attribute:"solution",
value:
"Upgrade the bind9 packages.
For the stable distribution (buster), these problems have been fixed
in version 1:9.11.5.P4+dfsg-5.1+deb10u2."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N");
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:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8624");
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:bind9");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/17");
script_set_attribute(attribute:"patch_publication_date", value:"2020/08/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/28");
script_set_attribute(attribute:"stig_severity", value:"I");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2020-2021 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:"10.0", prefix:"bind9", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"bind9-doc", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"bind9-host", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"bind9utils", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"dnsutils", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libbind-dev", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libbind-export-dev", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libbind9-161", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libdns-export1104", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libdns-export1104-udeb", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libdns1104", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libirs-export161", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libirs-export161-udeb", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libirs161", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisc-export1100", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisc-export1100-udeb", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisc1100", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisccc-export161", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisccc-export161-udeb", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisccc161", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisccfg-export163", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisccfg-export163-udeb", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"libisccfg163", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) flag++;
if (deb_check(release:"10.0", prefix:"liblwres161", reference:"1:9.11.5.P4+dfsg-5.1+deb10u2")) 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 |
---|---|---|
debian | debian_linux | bind9 |
debian | debian_linux | 10.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8619
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8622
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8623
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8624
bugs.debian.org/cgi-bin/bugreport.cgi?bug=966497
packages.debian.org/source/buster/bind9
security-tracker.debian.org/tracker/CVE-2020-8619
security-tracker.debian.org/tracker/CVE-2020-8622
security-tracker.debian.org/tracker/CVE-2020-8623
security-tracker.debian.org/tracker/CVE-2020-8624
security-tracker.debian.org/tracker/source-package/bind9
www.debian.org/security/2020/dsa-4752