Linux Distros Unpatched Vulnerability : CVE-2018-12886

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

include('compat.inc');

if (description)
{
  script_id(261039);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/02");

  script_cve_id("CVE-2018-12886");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2018-12886");

  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.

  - stack_protect_prologue in cfgexpand.c and stack_protect_epilogue in function.c in GNU Compiler Collection
    (GCC) 4.1 through 8 (under certain circumstances) generate instruction sequences when targeting ARM
    targets that spill the address of the stack protector guard, which allows an attacker to bypass the
    protection of -fstack-protector, -fstack-protector-all, -fstack-protector-strong, and -fstack-protector-
    explicit against stack overflow by controlling what the stack canary is compared against. (CVE-2018-12886)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2018-12886");
  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:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/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:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-12886");

  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:"2019/05/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gcc-4.8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gcc-4.9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gcc-6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gcc-7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gcc-8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gcc-arm-none-eabi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gcc-snapshot");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  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("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "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/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "cpp-4.8"},
          {"reference": "cpp-4.8-doc"},
          {"reference": "g++-4.8"},
          {"reference": "g++-4.8-multilib"},
          {"reference": "gcc-4.8"},
          {"reference": "gcc-4.8-base"},
          {"reference": "gcc-4.8-hppa64"},
          {"reference": "gcc-4.8-locales"},
          {"reference": "gcc-4.8-multilib"},
          {"reference": "gcc-4.8-plugin-dev"},
          {"reference": "lib32asan0"},
          {"reference": "lib32asan0-dbg"},
          {"reference": "lib32atomic1"},
          {"reference": "lib32atomic1-dbg"},
          {"reference": "lib32gcc-4.8-dev"},
          {"reference": "lib32gomp1"},
          {"reference": "lib32gomp1-dbg"},
          {"reference": "lib32itm1"},
          {"reference": "lib32itm1-dbg"},
          {"reference": "lib64asan0"},
          {"reference": "lib64asan0-dbg"},
          {"reference": "lib64atomic1"},
          {"reference": "lib64atomic1-dbg"},
          {"reference": "lib64gcc-4.8-dev"},
          {"reference": "lib64gomp1"},
          {"reference": "lib64gomp1-dbg"},
          {"reference": "lib64itm1"},
          {"reference": "lib64itm1-dbg"},
          {"reference": "libasan0"},
          {"reference": "libasan0-dbg"},
          {"reference": "libatomic1"},
          {"reference": "libatomic1-dbg"},
          {"reference": "libgcc-4.8-dev"},
          {"reference": "libgomp1"},
          {"reference": "libgomp1-dbg"},
          {"reference": "libhfatomic1"},
          {"reference": "libhfatomic1-dbg"},
          {"reference": "libhfgcc-4.8-dev"},
          {"reference": "libhfgomp1"},
          {"reference": "libhfgomp1-dbg"},
          {"reference": "libhfitm1"},
          {"reference": "libhfitm1-dbg"},
          {"reference": "libitm1"},
          {"reference": "libitm1-dbg"},
          {"reference": "libn32asan0"},
          {"reference": "libn32asan0-dbg"},
          {"reference": "libn32atomic1"},
          {"reference": "libn32atomic1-dbg"},
          {"reference": "libn32gcc-4.8-dev"},
          {"reference": "libn32gomp1"},
          {"reference": "libn32gomp1-dbg"},
          {"reference": "libn32itm1"},
          {"reference": "libn32itm1-dbg"},
          {"reference": "libsfatomic1"},
          {"reference": "libsfatomic1-dbg"},
          {"reference": "libsfgcc-4.8-dev"},
          {"reference": "libsfgomp1"},
          {"reference": "libsfgomp1-dbg"},
          {"reference": "libsfitm1"},
          {"reference": "libsfitm1-dbg"},
          {"reference": "libx32atomic1"},
          {"reference": "libx32atomic1-dbg"},
          {"reference": "libx32gcc-4.8-dev"},
          {"reference": "libx32gomp1"},
          {"reference": "libx32gomp1-dbg"},
          {"reference": "libx32itm1"},
          {"reference": "libx32itm1-dbg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "gcc-4.8"},
          {"reference": "gcc-4.9"},
          {"reference": "gcc-arm-none-eabi"},
          {"reference": "gcc-snapshot"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "cpp-7"},
          {"reference": "cpp-7-doc"},
          {"reference": "cpp-8"},
          {"reference": "cpp-8-doc"},
          {"reference": "g++-7"},
          {"reference": "g++-7-multilib"},
          {"reference": "g++-8"},
          {"reference": "g++-8-multilib"},
          {"reference": "gcc-4.8"},
          {"reference": "gcc-6"},
          {"reference": "gcc-7"},
          {"reference": "gcc-7-base"},
          {"reference": "gcc-7-hppa64-linux-gnu"},
          {"reference": "gcc-7-locales"},
          {"reference": "gcc-7-multilib"},
          {"reference": "gcc-7-plugin-dev"},
          {"reference": "gcc-7-test-results"},
          {"reference": "gcc-8"},
          {"reference": "gcc-8-base"},
          {"reference": "gcc-8-hppa64-linux-gnu"},
          {"reference": "gcc-8-locales"},
          {"reference": "gcc-8-multilib"},
          {"reference": "gcc-8-plugin-dev"},
          {"reference": "gcc-8-test-results"},
          {"reference": "gcc-arm-none-eabi"},
          {"reference": "gcc-snapshot"},
          {"reference": "lib32asan4"},
          {"reference": "lib32asan4-dbg"},
          {"reference": "lib32atomic1"},
          {"reference": "lib32atomic1-dbg"},
          {"reference": "lib32cilkrts5"},
          {"reference": "lib32cilkrts5-dbg"},
          {"reference": "lib32gcc-7-dev"},
          {"reference": "lib32gcc-8-dev"},
          {"reference": "lib32gcc1"},
          {"reference": "lib32gcc1-dbg"},
          {"reference": "lib32gomp1"},
          {"reference": "lib32gomp1-dbg"},
          {"reference": "lib32itm1"},
          {"reference": "lib32itm1-dbg"},
          {"reference": "lib32ubsan0"},
          {"reference": "lib32ubsan0-dbg"},
          {"reference": "lib64asan4"},
          {"reference": "lib64asan4-dbg"},
          {"reference": "lib64atomic1"},
          {"reference": "lib64atomic1-dbg"},
          {"reference": "lib64cilkrts5"},
          {"reference": "lib64cilkrts5-dbg"},
          {"reference": "lib64gcc-7-dev"},
          {"reference": "lib64gcc-8-dev"},
          {"reference": "lib64gcc1"},
          {"reference": "lib64gcc1-dbg"},
          {"reference": "lib64gomp1"},
          {"reference": "lib64gomp1-dbg"},
          {"reference": "lib64itm1"},
          {"reference": "lib64itm1-dbg"},
          {"reference": "lib64ubsan0"},
          {"reference": "lib64ubsan0-dbg"},
          {"reference": "libasan4"},
          {"reference": "libasan4-dbg"},
          {"reference": "libatomic1"},
          {"reference": "libatomic1-dbg"},
          {"reference": "libcilkrts5"},
          {"reference": "libcilkrts5-dbg"},
          {"reference": "libgcc-7-dev"},
          {"reference": "libgcc-8-dev"},
          {"reference": "libgcc1"},
          {"reference": "libgcc1-dbg"},
          {"reference": "libgcc2"},
          {"reference": "libgcc2-dbg"},
          {"reference": "libgcc4"},
          {"reference": "libgcc4-dbg"},
          {"reference": "libgccjit-7-dev"},
          {"reference": "libgccjit-7-doc"},
          {"reference": "libgomp1"},
          {"reference": "libgomp1-dbg"},
          {"reference": "libhfasan4"},
          {"reference": "libhfasan4-dbg"},
          {"reference": "libhfcilkrts5"},
          {"reference": "libhfcilkrts5-dbg"},
          {"reference": "libhfgcc-7-dev"},
          {"reference": "libhfgcc-8-dev"},
          {"reference": "libhfgcc1"},
          {"reference": "libhfgcc1-dbg"},
          {"reference": "libhfgomp1"},
          {"reference": "libhfgomp1-dbg"},
          {"reference": "libhfitm1"},
          {"reference": "libhfitm1-dbg"},
          {"reference": "libhfubsan0"},
          {"reference": "libhfubsan0-dbg"},
          {"reference": "libitm1"},
          {"reference": "libitm1-dbg"},
          {"reference": "libn32atomic1"},
          {"reference": "libn32atomic1-dbg"},
          {"reference": "libn32gcc-7-dev"},
          {"reference": "libn32gcc-8-dev"},
          {"reference": "libn32gcc1"},
          {"reference": "libn32gcc1-dbg"},
          {"reference": "libn32gomp1"},
          {"reference": "libn32gomp1-dbg"},
          {"reference": "libsfasan4"},
          {"reference": "libsfasan4-dbg"},
          {"reference": "libsfcilkrts5"},
          {"reference": "libsfcilkrts5-dbg"},
          {"reference": "libsfgcc-7-dev"},
          {"reference": "libsfgcc-8-dev"},
          {"reference": "libsfgcc1"},
          {"reference": "libsfgcc1-dbg"},
          {"reference": "libsfgomp1"},
          {"reference": "libsfgomp1-dbg"},
          {"reference": "libsfitm1"},
          {"reference": "libsfitm1-dbg"},
          {"reference": "libsfubsan0"},
          {"reference": "libsfubsan0-dbg"},
          {"reference": "libubsan0"},
          {"reference": "libubsan0-dbg"},
          {"reference": "libx32asan4"},
          {"reference": "libx32asan4-dbg"},
          {"reference": "libx32atomic1"},
          {"reference": "libx32cilkrts5"},
          {"reference": "libx32cilkrts5-dbg"},
          {"reference": "libx32gcc-7-dev"},
          {"reference": "libx32gcc-8-dev"},
          {"reference": "libx32gcc1"},
          {"reference": "libx32gcc1-dbg"},
          {"reference": "libx32gomp1"},
          {"reference": "libx32gomp1-dbg"},
          {"reference": "libx32itm1"},
          {"reference": "libx32itm1-dbg"},
          {"reference": "libx32ubsan0"},
          {"reference": "libx32ubsan0-dbg"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "gcc-7"},
          {"reference": "gcc-8"},
          {"reference": "gcc-arm-none-eabi"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "gcc-arm-none-eabi"},
          {"reference": "gcc-snapshot"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "gcc-arm-none-eabi"},
          {"reference": "gcc-snapshot"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "gcc-arm-none-eabi"},
          {"reference": "gcc-snapshot"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "gcc-arm-none-eabi"},
          {"reference": "gcc-snapshot"}
        ]
      }
    ]
  }
};

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');
}