Linux Distros Unpatched Vulnerability : CVE-2021-26291

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(223770);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/14");

  script_cve_id("CVE-2021-26291");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2021-26291");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - Apache Maven will follow repositories that are defined in a dependency's Project Object Model (pom) which
    may be surprising to some users, resulting in potential risk if a malicious actor takes over that
    repository or is able to insert themselves into a position to pretend to be that repository. Maven is
    changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by
    default. More details available in the referenced urls. If you are currently using a repository manager to
    govern the repositories used by your builds, you are unaffected by the risks present in the legacy
    behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more
    information about repository management: https://maven.apache.org/repository-management.html
    (CVE-2021-26291)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2021-26291");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-26291");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2021-26291");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/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:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-26291");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/04/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/04");

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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:apache-commons-codec");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:atinject");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:maven-shared-utils");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:apache-commons-codec");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:apache-commons-logging");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:atinject");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:cdi-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:geronimo-annotation");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glassfish-el");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:glassfish-el-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:google-guice");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:guava");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:hawtjni");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:hawtjni-runtime");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpcomponents-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:httpcomponents-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:jansi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:jansi-native");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:maven-wagon");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:maven-wagon-http-shared");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:maven-wagon-provider-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:plexus-cipher");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:plexus-classworlds");
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  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
  script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/OS/CentOS Linux-8", "Host/OS/Debian Linux-11", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.04", "Host/OS/Ubuntu Linux-25.10");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "libmaven3-core-java"},
          {"reference": "maven"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "maven"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "maven"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "maven"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "maven"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "aopalliance"},
          {"reference": "apache-commons-cli"},
          {"reference": "apache-commons-codec"},
          {"reference": "apache-commons-io"},
          {"reference": "apache-commons-lang3"},
          {"reference": "apache-commons-logging"},
          {"reference": "atinject"},
          {"reference": "cdi-api"},
          {"reference": "geronimo-annotation"},
          {"reference": "glassfish-el"},
          {"reference": "glassfish-el-api"},
          {"reference": "google-guice"},
          {"reference": "guava"},
          {"reference": "guava20"},
          {"reference": "hawtjni"},
          {"reference": "hawtjni-runtime"},
          {"reference": "httpcomponents-client"},
          {"reference": "httpcomponents-core"},
          {"reference": "jansi"},
          {"reference": "jansi-native"},
          {"reference": "jboss-interceptors-1.2-api"},
          {"reference": "jcl-over-slf4j"},
          {"reference": "jsoup"},
          {"reference": "jsr-305"},
          {"reference": "maven"},
          {"reference": "maven-lib"},
          {"reference": "maven-openjdk11"},
          {"reference": "maven-openjdk17"},
          {"reference": "maven-openjdk8"},
          {"reference": "maven-resolver"},
          {"reference": "maven-resolver-api"},
          {"reference": "maven-resolver-connector-basic"},
          {"reference": "maven-resolver-impl"},
          {"reference": "maven-resolver-spi"},
          {"reference": "maven-resolver-transport-wagon"},
          {"reference": "maven-resolver-util"},
          {"reference": "maven-shared-utils"},
          {"reference": "maven-wagon"},
          {"reference": "maven-wagon-file"},
          {"reference": "maven-wagon-http"},
          {"reference": "maven-wagon-http-shared"},
          {"reference": "maven-wagon-provider-api"},
          {"reference": "plexus-cipher"},
          {"reference": "plexus-classworlds"},
          {"reference": "plexus-containers"},
          {"reference": "plexus-containers-component-annotations"},
          {"reference": "plexus-interpolation"},
          {"reference": "plexus-sec-dispatcher"},
          {"reference": "plexus-utils"},
          {"reference": "sisu"},
          {"reference": "sisu-inject"},
          {"reference": "sisu-plexus"},
          {"reference": "slf4j"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "aopalliance"},
          {"reference": "apache-commons-cli"},
          {"reference": "apache-commons-codec"},
          {"reference": "apache-commons-io"},
          {"reference": "apache-commons-lang3"},
          {"reference": "apache-commons-logging"},
          {"reference": "atinject"},
          {"reference": "cdi-api"},
          {"reference": "geronimo-annotation"},
          {"reference": "glassfish-el"},
          {"reference": "glassfish-el-api"},
          {"reference": "google-guice"},
          {"reference": "guava"},
          {"reference": "guava20"},
          {"reference": "hawtjni"},
          {"reference": "hawtjni-runtime"},
          {"reference": "httpcomponents-client"},
          {"reference": "httpcomponents-core"},
          {"reference": "jansi"},
          {"reference": "jansi-native"},
          {"reference": "jboss-interceptors-1.2-api"},
          {"reference": "jcl-over-slf4j"},
          {"reference": "jsoup"},
          {"reference": "jsr-305"},
          {"reference": "maven"},
          {"reference": "maven-lib"},
          {"reference": "maven-openjdk11"},
          {"reference": "maven-openjdk17"},
          {"reference": "maven-openjdk8"},
          {"reference": "maven-resolver"},
          {"reference": "maven-resolver-api"},
          {"reference": "maven-resolver-connector-basic"},
          {"reference": "maven-resolver-impl"},
          {"reference": "maven-resolver-spi"},
          {"reference": "maven-resolver-transport-wagon"},
          {"reference": "maven-resolver-util"},
          {"reference": "maven-shared-utils"},
          {"reference": "maven-wagon"},
          {"reference": "maven-wagon-file"},
          {"reference": "maven-wagon-http"},
          {"reference": "maven-wagon-http-shared"},
          {"reference": "maven-wagon-provider-api"},
          {"reference": "plexus-cipher"},
          {"reference": "plexus-classworlds"},
          {"reference": "plexus-containers"},
          {"reference": "plexus-containers-component-annotations"},
          {"reference": "plexus-interpolation"},
          {"reference": "plexus-sec-dispatcher"},
          {"reference": "plexus-utils"},
          {"reference": "sisu"},
          {"reference": "sisu-inject"},
          {"reference": "sisu-plexus"},
          {"reference": "slf4j"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "maven"},
          {"reference": "maven-lib"},
          {"reference": "maven-openjdk11"},
          {"reference": "maven-openjdk17"},
          {"reference": "maven-openjdk21"},
          {"reference": "maven-openjdk25"},
          {"reference": "maven-openjdk8"},
          {"reference": "maven-unbound"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}