Debian LTS security update for modsecurity-apache addressing excessive nested JSON objects vulnerabilit
Reporter | Title | Published | Views | Family All 35 |
---|---|---|---|---|
![]() | EulerOS 2.0 SP5 : mod_security (EulerOS-SA-2022-1332) | 21 Mar 202200:00 | – | nessus |
![]() | Debian DSA-5023-1 : modsecurity-apache - security update | 19 Dec 202100:00 | – | nessus |
![]() | EulerOS 2.0 SP8 : mod_security (EulerOS-SA-2022-1355) | 28 Mar 202200:00 | – | nessus |
![]() | Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 ESM : ModSecurity vulnerabilities (USN-6370-1) | 14 Sep 202300:00 | – | nessus |
![]() | openSUSE 15 Security Update : modsecurity (openSUSE-SU-2023:0269-1) | 27 Sep 202300:00 | – | nessus |
![]() | openSUSE 15 Security Update : modsecurity (openSUSE-SU-2023:0257-1) | 26 Sep 202300:00 | – | nessus |
![]() | Oracle HTTP Server (Jan 2023 CPU) | 23 Jan 202300:00 | – | nessus |
![]() | Exploit for Uncontrolled Recursion in Trustwave Modsecurity | 20 Nov 202218:01 | – | githubexploit |
![]() | Updated apache-mod_security packages fix security vulnerability | 22 Dec 202102:27 | – | mageia |
![]() | CVE-2021-42717 | 7 Dec 202122:15 | – | debiancve |
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3031. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('compat.inc');
if (description)
{
script_id(161656);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/26");
script_cve_id("CVE-2021-42717");
script_name(english:"Debian DLA-3031-1 : modsecurity-apache - LTS security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-3031
advisory.
- ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with
nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests.
Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes
for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly
vulnerable: the affected versions include 2.8.0 through 2.9.4. (CVE-2021-42717)
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://www.debian.org/lts/security/2022/dla-3031");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-42717");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/modsecurity-apache");
script_set_attribute(attribute:"solution", value:
"Upgrade the modsecurity-apache packages.
For Debian 9 Stretch, this problem has been fixed in version 2.9.1-2+deb9u1.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/I:N/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-2021-42717");
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:"2021/12/07");
script_set_attribute(attribute:"patch_publication_date", value:"2022/05/28");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/29");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libapache2-mod-security2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libapache2-modsecurity");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022-2023 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('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:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', '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': '9.0', 'prefix': 'libapache2-mod-security2', 'reference': '2.9.1-2+deb9u1'},
{'release': '9.0', 'prefix': 'libapache2-modsecurity', 'reference': '2.9.1-2+deb9u1'}
];
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, 'libapache2-mod-security2 / libapache2-modsecurity');
}
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