6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.7 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
7.9 High
AI Score
Confidence
High
0.437 Medium
EPSS
Percentile
97.4%
The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2021:2259 advisory.
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 package checks in this plugin were extracted from
# Rocky Linux Security Advisory RLSA-2021:2259.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(157769);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/06");
script_cve_id("CVE-2021-23017");
script_xref(name:"RLSA", value:"2021:2259");
script_xref(name:"IAVB", value:"2021-B-0031");
script_name(english:"Rocky Linux 8 : nginx:1.18 (RLSA-2021:2259)");
script_set_attribute(attribute:"synopsis", value:
"The remote Rocky Linux host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the
RLSA-2021:2259 advisory.
- A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP
packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or
potential other impact. (CVE-2021-23017)
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://errata.rockylinux.org/RLSA-2021:2259");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1963121");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/PR:N/UI:N/S:U/C:H/I:H/A:L");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-23017");
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:"2021/05/25");
script_set_attribute(attribute:"patch_publication_date", value:"2021/07/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/09");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-all-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-debugsource");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-filesystem");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-http-image-filter");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-http-image-filter-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-http-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-http-perl-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-http-xslt-filter");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-http-xslt-filter-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-mail");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-mail-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-stream");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:nginx-mod-stream-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:rocky:linux:8");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Rocky Linux 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/RockyLinux/release", "Host/RockyLinux/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RockyLinux/release');
if (isnull(os_release) || 'Rocky Linux' >!< os_release) audit(AUDIT_OS_NOT, 'Rocky Linux');
var os_ver = pregmatch(pattern: "Rocky(?: Linux)? release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Rocky Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Rocky Linux 8.x', 'Rocky Linux ' + os_ver);
if (!get_kb_item('Host/RockyLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Rocky Linux', cpu);
var module_ver = get_kb_item('Host/RockyLinux/appstream/nginx');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module nginx:1.18');
if ('1.18' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module nginx:' + module_ver);
var appstreams = {
'nginx:1.18': [
{'reference':'nginx-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-all-modules-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-debugsource-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-debugsource-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-filesystem-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-image-filter-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-image-filter-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-image-filter-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-image-filter-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-perl-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-perl-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-perl-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-perl-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-xslt-filter-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-xslt-filter-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-xslt-filter-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-http-xslt-filter-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-mail-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-mail-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-mail-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-mail-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-stream-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-stream-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-stream-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'nginx-mod-stream-debuginfo-1.18.0-3.module+el8.4.0+544+e40554cf.1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
]
};
var flag = 0;
var appstreams_found = 0;
foreach var module (keys(appstreams)) {
var appstream = NULL;
var appstream_name = NULL;
var appstream_version = NULL;
var appstream_split = split(module, sep:':', keep:FALSE);
if (!empty_or_null(appstream_split)) {
appstream_name = appstream_split[0];
appstream_version = appstream_split[1];
if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/RockyLinux/appstream/' + appstream_name);
}
if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
appstreams_found++;
foreach var package_array ( appstreams[module] ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'Rocky-' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
}
}
if (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module nginx:1.18');
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'nginx / nginx-all-modules / nginx-debuginfo / nginx-debugsource / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
rocky | linux | nginx | p-cpe:/a:rocky:linux:nginx |
rocky | linux | nginx-all-modules | p-cpe:/a:rocky:linux:nginx-all-modules |
rocky | linux | nginx-debuginfo | p-cpe:/a:rocky:linux:nginx-debuginfo |
rocky | linux | nginx-debugsource | p-cpe:/a:rocky:linux:nginx-debugsource |
rocky | linux | nginx-filesystem | p-cpe:/a:rocky:linux:nginx-filesystem |
rocky | linux | nginx-mod-http-image-filter | p-cpe:/a:rocky:linux:nginx-mod-http-image-filter |
rocky | linux | nginx-mod-http-image-filter-debuginfo | p-cpe:/a:rocky:linux:nginx-mod-http-image-filter-debuginfo |
rocky | linux | nginx-mod-http-perl | p-cpe:/a:rocky:linux:nginx-mod-http-perl |
rocky | linux | nginx-mod-http-perl-debuginfo | p-cpe:/a:rocky:linux:nginx-mod-http-perl-debuginfo |
rocky | linux | nginx-mod-http-xslt-filter | p-cpe:/a:rocky:linux:nginx-mod-http-xslt-filter |
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
7.7 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
7.9 High
AI Score
Confidence
High
0.437 Medium
EPSS
Percentile
97.4%