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Linux Distros Unpatched Vulnerability : CVE-2019-7309

🗓️ 12 Aug 2025 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 1 Views

Linux/Unix CVE-2019-7309: glibc memcmp on x32 mishandles RDX MSB, returns zero; patch unavailable.

Related
Refs
Code
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Netcool Operations Insight v1.6.8 addresses multiple security vulnerabilities.
11 Apr 202311:47
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Security Vulnerabilities may affect IBM Robotic Process Automation for Cloud Pak.
26 Mar 202503:30
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in GNU C Library affects IBM Watson Studio Local
20 Dec 201913:55
–ibm
CBLMariner		CVE-2019-7309 affecting package glibc 2.28-24
30 Nov 202019:30
–cbl_mariner
CNVD		GNU C Library Local Denial of Service Vulnerability
3 Feb 201900:00
–cnvd
CVE		CVE-2019-7309
3 Feb 201902:00
–cve
Cvelist		CVE-2019-7309
3 Feb 201902:00
–cvelist
Debian CVE		CVE-2019-7309
3 Feb 201902:00
–debiancve
EUVD		EUVD-2019-16853
7 Oct 202500:30
–euvd
Tenable Nessus		GLSA-202006-04 : glibc: Multiple vulnerabilities
17 Jun 202000:00
–nessus
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(248930);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/12");

  script_cve_id("CVE-2019-7309");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2019-7309");

  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.

  - In the GNU C Library (aka glibc or libc6) through 2.29, the memcmp function for the x32 architecture can
    incorrectly return zero (indicating that the inputs are equal) because the RDX most significant bit is
    mishandled. (CVE-2019-7309)

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-2019-7309");
  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:L/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:L/AC:L/PR:L/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-2019-7309");

  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:"2019/02/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/12");

  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:"p-cpe:/a:canonical:ubuntu_linux:eglibc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:glibc");
  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 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");

  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": "eglibc-source"},
          {"reference": "glibc-doc"},
          {"reference": "libc-bin"},
          {"reference": "libc-dev-bin"},
          {"reference": "libc0.1"},
          {"reference": "libc0.1-dbg"},
          {"reference": "libc0.1-dev"},
          {"reference": "libc0.1-dev-i386"},
          {"reference": "libc0.1-i386"},
          {"reference": "libc0.1-i686"},
          {"reference": "libc0.1-pic"},
          {"reference": "libc0.1-prof"},
          {"reference": "libc0.1-udeb"},
          {"reference": "libc0.3"},
          {"reference": "libc0.3-dbg"},
          {"reference": "libc0.3-dev"},
          {"reference": "libc0.3-i686"},
          {"reference": "libc0.3-pic"},
          {"reference": "libc0.3-prof"},
          {"reference": "libc0.3-udeb"},
          {"reference": "libc0.3-xen"},
          {"reference": "libc6"},
          {"reference": "libc6-amd64"},
          {"reference": "libc6-armel"},
          {"reference": "libc6-armhf"},
          {"reference": "libc6-dbg"},
          {"reference": "libc6-dev"},
          {"reference": "libc6-dev-amd64"},
          {"reference": "libc6-dev-armel"},
          {"reference": "libc6-dev-armhf"},
          {"reference": "libc6-dev-i386"},
          {"reference": "libc6-dev-mips64"},
          {"reference": "libc6-dev-mipsn32"},
          {"reference": "libc6-dev-powerpc"},
          {"reference": "libc6-dev-ppc64"},
          {"reference": "libc6-dev-s390"},
          {"reference": "libc6-dev-sparc"},
          {"reference": "libc6-dev-sparc64"},
          {"reference": "libc6-dev-x32"},
          {"reference": "libc6-i386"},
          {"reference": "libc6-i686"},
          {"reference": "libc6-loongson2f"},
          {"reference": "libc6-mips64"},
          {"reference": "libc6-mipsn32"},
          {"reference": "libc6-pic"},
          {"reference": "libc6-powerpc"},
          {"reference": "libc6-ppc64"},
          {"reference": "libc6-prof"},
          {"reference": "libc6-s390"},
          {"reference": "libc6-sparc"},
          {"reference": "libc6-sparc64"},
          {"reference": "libc6-udeb"},
          {"reference": "libc6-x32"},
          {"reference": "libc6-xen"},
          {"reference": "libc6.1"},
          {"reference": "libc6.1-alphaev67"},
          {"reference": "libc6.1-dbg"},
          {"reference": "libc6.1-dev"},
          {"reference": "libc6.1-pic"},
          {"reference": "libc6.1-prof"},
          {"reference": "libc6.1-udeb"},
          {"reference": "libnss-dns-udeb"},
          {"reference": "libnss-files-udeb"},
          {"reference": "locales"},
          {"reference": "locales-all"},
          {"reference": "multiarch-support"},
          {"reference": "nscd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "glibc-doc"},
          {"reference": "glibc-source"},
          {"reference": "libc-bin"},
          {"reference": "libc-dev-bin"},
          {"reference": "libc-l10n"},
          {"reference": "libc0.1"},
          {"reference": "libc0.1-dbg"},
          {"reference": "libc0.1-dev"},
          {"reference": "libc0.1-dev-i386"},
          {"reference": "libc0.1-i386"},
          {"reference": "libc0.1-i686"},
          {"reference": "libc0.1-pic"},
          {"reference": "libc0.1-udeb"},
          {"reference": "libc0.3"},
          {"reference": "libc0.3-dbg"},
          {"reference": "libc0.3-dev"},
          {"reference": "libc0.3-pic"},
          {"reference": "libc0.3-udeb"},
          {"reference": "libc6"},
          {"reference": "libc6-amd64"},
          {"reference": "libc6-armel"},
          {"reference": "libc6-armhf"},
          {"reference": "libc6-dbg"},
          {"reference": "libc6-dev"},
          {"reference": "libc6-dev-amd64"},
          {"reference": "libc6-dev-armel"},
          {"reference": "libc6-dev-armhf"},
          {"reference": "libc6-dev-i386"},
          {"reference": "libc6-dev-mips32"},
          {"reference": "libc6-dev-mips64"},
          {"reference": "libc6-dev-mipsn32"},
          {"reference": "libc6-dev-powerpc"},
          {"reference": "libc6-dev-ppc64"},
          {"reference": "libc6-dev-s390"},
          {"reference": "libc6-dev-sparc"},
          {"reference": "libc6-dev-sparc64"},
          {"reference": "libc6-dev-x32"},
          {"reference": "libc6-i386"},
          {"reference": "libc6-i686"},
          {"reference": "libc6-mips32"},
          {"reference": "libc6-mips64"},
          {"reference": "libc6-mipsn32"},
          {"reference": "libc6-pic"},
          {"reference": "libc6-powerpc"},
          {"reference": "libc6-ppc64"},
          {"reference": "libc6-s390"},
          {"reference": "libc6-sparc"},
          {"reference": "libc6-sparc64"},
          {"reference": "libc6-udeb"},
          {"reference": "libc6-x32"},
          {"reference": "libc6-xen"},
          {"reference": "libc6.1"},
          {"reference": "libc6.1-alphaev67"},
          {"reference": "libc6.1-dbg"},
          {"reference": "libc6.1-dev"},
          {"reference": "libc6.1-pic"},
          {"reference": "libc6.1-udeb"},
          {"reference": "locales"},
          {"reference": "locales-all"},
          {"reference": "multiarch-support"},
          {"reference": "nscd"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "glibc-doc"},
          {"reference": "glibc-source"},
          {"reference": "libc-bin"},
          {"reference": "libc-dev-bin"},
          {"reference": "libc-l10n"},
          {"reference": "libc0.1"},
          {"reference": "libc0.1-dbg"},
          {"reference": "libc0.1-dev"},
          {"reference": "libc0.1-dev-i386"},
          {"reference": "libc0.1-i386"},
          {"reference": "libc0.1-pic"},
          {"reference": "libc0.1-udeb"},
          {"reference": "libc0.3"},
          {"reference": "libc0.3-dbg"},
          {"reference": "libc0.3-dev"},
          {"reference": "libc0.3-pic"},
          {"reference": "libc0.3-udeb"},
          {"reference": "libc0.3-xen"},
          {"reference": "libc6"},
          {"reference": "libc6-amd64"},
          {"reference": "libc6-armel"},
          {"reference": "libc6-armhf"},
          {"reference": "libc6-dbg"},
          {"reference": "libc6-dev"},
          {"reference": "libc6-dev-amd64"},
          {"reference": "libc6-dev-armel"},
          {"reference": "libc6-dev-armhf"},
          {"reference": "libc6-dev-i386"},
          {"reference": "libc6-dev-mips32"},
          {"reference": "libc6-dev-mips64"},
          {"reference": "libc6-dev-mipsn32"},
          {"reference": "libc6-dev-powerpc"},
          {"reference": "libc6-dev-ppc64"},
          {"reference": "libc6-dev-s390"},
          {"reference": "libc6-dev-sparc"},
          {"reference": "libc6-dev-sparc64"},
          {"reference": "libc6-dev-x32"},
          {"reference": "libc6-i386"},
          {"reference": "libc6-mips32"},
          {"reference": "libc6-mips64"},
          {"reference": "libc6-mipsn32"},
          {"reference": "libc6-pic"},
          {"reference": "libc6-powerpc"},
          {"reference": "libc6-ppc64"},
          {"reference": "libc6-s390"},
          {"reference": "libc6-sparc"},
          {"reference": "libc6-sparc64"},
          {"reference": "libc6-udeb"},
          {"reference": "libc6-x32"},
          {"reference": "libc6-xen"},
          {"reference": "libc6.1"},
          {"reference": "libc6.1-alphaev67"},
          {"reference": "libc6.1-dbg"},
          {"reference": "libc6.1-dev"},
          {"reference": "libc6.1-pic"},
          {"reference": "libc6.1-udeb"},
          {"reference": "locales"},
          {"reference": "locales-all"},
          {"reference": "multiarch-support"},
          {"reference": "nscd"}
        ]
      }
    ]
  }
};

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');
}

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12 Aug 2025 00:00Current
6.5Medium risk
Vulners AI Score6.5
CVSS 22.1
CVSS 35.5
EPSS0.00217
linuxglibcmemcmpx32rdxmsbcve20197309patchunavailable
1