The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4986 advisory.
A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65. (CVE-2021-30640)
Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.
(CVE-2021-41079)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-4986. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(154177);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/10/15");
script_cve_id("CVE-2021-30640", "CVE-2021-41079");
script_name(english:"Debian DSA-4986-1 : tomcat9 - security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
script_set_attribute(attribute:"description", value:
"The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-4986 advisory.
- A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of
a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue
affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65. (CVE-2021-30640)
- Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate
incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially
crafted packet could be used to trigger an infinite loop resulting in a denial of service.
(CVE-2021-41079)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/tomcat9");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4986");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-30640");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-41079");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/tomcat9");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/tomcat9");
script_set_attribute(attribute:"solution", value:
"Upgrade the tomcat9 packages.
For the stable distribution (bullseye), these problems have been fixed in version 9.0.43-2~deb11u2.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/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:H/PR:N/UI:N/S:U/C:L/I:H/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-2021-30640");
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:"2021/03/10");
script_set_attribute(attribute:"patch_publication_date", value:"2021/10/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/15");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libtomcat9-embed-java");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libtomcat9-java");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat9");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat9-admin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat9-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat9-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat9-examples");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tomcat9-user");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021 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/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+|^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0 / 11.0', 'Debian ' + release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);
var pkgs = [
{'release': '10.0', 'prefix': 'libtomcat9-embed-java', 'reference': '9.0.31-1~deb10u6'},
{'release': '10.0', 'prefix': 'libtomcat9-java', 'reference': '9.0.31-1~deb10u6'},
{'release': '10.0', 'prefix': 'tomcat9', 'reference': '9.0.31-1~deb10u6'},
{'release': '10.0', 'prefix': 'tomcat9-admin', 'reference': '9.0.31-1~deb10u6'},
{'release': '10.0', 'prefix': 'tomcat9-common', 'reference': '9.0.31-1~deb10u6'},
{'release': '10.0', 'prefix': 'tomcat9-docs', 'reference': '9.0.31-1~deb10u6'},
{'release': '10.0', 'prefix': 'tomcat9-examples', 'reference': '9.0.31-1~deb10u6'},
{'release': '10.0', 'prefix': 'tomcat9-user', 'reference': '9.0.31-1~deb10u6'},
{'release': '11.0', 'prefix': 'libtomcat9-embed-java', 'reference': '9.0.43-2~deb11u2'},
{'release': '11.0', 'prefix': 'libtomcat9-java', 'reference': '9.0.43-2~deb11u2'},
{'release': '11.0', 'prefix': 'tomcat9', 'reference': '9.0.43-2~deb11u2'},
{'release': '11.0', 'prefix': 'tomcat9-admin', 'reference': '9.0.43-2~deb11u2'},
{'release': '11.0', 'prefix': 'tomcat9-common', 'reference': '9.0.43-2~deb11u2'},
{'release': '11.0', 'prefix': 'tomcat9-docs', 'reference': '9.0.43-2~deb11u2'},
{'release': '11.0', 'prefix': 'tomcat9-examples', 'reference': '9.0.43-2~deb11u2'},
{'release': '11.0', 'prefix': 'tomcat9-user', 'reference': '9.0.43-2~deb11u2'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var release = NULL;
var prefix = NULL;
var reference = NULL;
if (!empty_or_null(package_array['release'])) release = package_array['release'];
if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (release && prefix && reference) {
if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : deb_report_get()
);
exit(0);
}
else
{
var tested = deb_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libtomcat9-embed-java / libtomcat9-java / tomcat9 / tomcat9-admin / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | libtomcat9-embed-java | p-cpe:/a:debian:debian_linux:libtomcat9-embed-java |
debian | debian_linux | libtomcat9-java | p-cpe:/a:debian:debian_linux:libtomcat9-java |
debian | debian_linux | tomcat9 | p-cpe:/a:debian:debian_linux:tomcat9 |
debian | debian_linux | tomcat9-admin | p-cpe:/a:debian:debian_linux:tomcat9-admin |
debian | debian_linux | tomcat9-common | p-cpe:/a:debian:debian_linux:tomcat9-common |
debian | debian_linux | tomcat9-docs | p-cpe:/a:debian:debian_linux:tomcat9-docs |
debian | debian_linux | tomcat9-examples | p-cpe:/a:debian:debian_linux:tomcat9-examples |
debian | debian_linux | tomcat9-user | p-cpe:/a:debian:debian_linux:tomcat9-user |
debian | debian_linux | 10.0 | cpe:/o:debian:debian_linux:10.0 |
debian | debian_linux | 11.0 | cpe:/o:debian:debian_linux:11.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30640
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41079
packages.debian.org/source/bullseye/tomcat9
packages.debian.org/source/buster/tomcat9
security-tracker.debian.org/tracker/CVE-2021-30640
security-tracker.debian.org/tracker/CVE-2021-41079
security-tracker.debian.org/tracker/source-package/tomcat9
www.debian.org/security/2021/dsa-4986