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nessusThis script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.ORACLELINUX_ELSA-2023-7083.NASL
HistoryNov 21, 2023 - 12:00 a.m.

Oracle Linux 8 : emacs (ELSA-2023-7083)

2023-11-2100:00:00
This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
12
oracle linux 8
gnu emacs
elsa-2023-7083
command injection vulnerability
shell metacharacters
cve-2022-48339
etags program
cve-2022-48337
security advisory
nessus scanner.

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

8 High

AI Score

Confidence

Low

0.002 Low

EPSS

Percentile

64.9%

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-7083 advisory.

  • An issue was discovered in GNU Emacs through 28.2. htmlfontify.el has a command injection vulnerability.
    In the hfy-istext-command function, the parameter file and parameter srcdir come from external input, and parameters are not escaped. If a file name or directory name contains shell metacharacters, code may be executed. (CVE-2022-48339)

  • GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a source-code file, because lib-src/etags.c uses the system C library function in its implementation of the etags program. For example, a victim may use the etags -u * command (suggested in the etags documentation) in a situation where the current working directory has contents that depend on untrusted input. (CVE-2022-48337)

Note that Nessus has not tested for these issues but has instead relied only on the applicationโ€™s self-reported version number.

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2023-7083.
##

include('compat.inc');

if (description)
{
  script_id(186095);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/21");

  script_cve_id("CVE-2022-48337", "CVE-2022-48339");

  script_name(english:"Oracle Linux 8 : emacs (ELSA-2023-7083)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2023-7083 advisory.

  - An issue was discovered in GNU Emacs through 28.2. htmlfontify.el has a command injection vulnerability.
    In the hfy-istext-command function, the parameter file and parameter srcdir come from external input, and
    parameters are not escaped. If a file name or directory name contains shell metacharacters, code may be
    executed. (CVE-2022-48339)

  - GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a
    source-code file, because lib-src/etags.c uses the system C library function in its implementation of the
    etags program. For example, a victim may use the etags -u * command (suggested in the etags
    documentation) in a situation where the current working directory has contents that depend on untrusted
    input. (CVE-2022-48337)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://linux.oracle.com/errata/ELSA-2023-7083.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-48337");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/02/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/11/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:linux:8:9:appstream_base");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:linux:8::appstream");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8:9:baseos_base");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8::baseos_latest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:emacs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:emacs-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:emacs-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:emacs-lucid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:emacs-nox");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:emacs-terminal");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 8', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var pkgs = [
    {'reference':'emacs-26.1-11.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-common-26.1-11.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-filesystem-26.1-11.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-lucid-26.1-11.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-nox-26.1-11.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-terminal-26.1-11.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-26.1-11.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-common-26.1-11.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-filesystem-26.1-11.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-lucid-26.1-11.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-nox-26.1-11.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'emacs-terminal-26.1-11.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  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 = 'EL' + 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) {
    if (exists_check) {
        if (rpm_exists(release:_release, rpm:exists_check) && 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++;
    } else {
        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 (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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, 'emacs / emacs-common / emacs-filesystem / etc');
}
VendorProductVersionCPE
oraclelinux8cpe:/a:oracle:linux:8:9:appstream_base
oraclelinux8cpe:/a:oracle:linux:8::appstream
oraclelinux8cpe:/o:oracle:linux:8
oraclelinux8cpe:/o:oracle:linux:8:9:baseos_base
oraclelinux8cpe:/o:oracle:linux:8::baseos_latest
oraclelinuxemacsp-cpe:/a:oracle:linux:emacs
oraclelinuxemacs-commonp-cpe:/a:oracle:linux:emacs-common
oraclelinuxemacs-filesystemp-cpe:/a:oracle:linux:emacs-filesystem
oraclelinuxemacs-lucidp-cpe:/a:oracle:linux:emacs-lucid
oraclelinuxemacs-noxp-cpe:/a:oracle:linux:emacs-nox
Rows per page:
1-10 of 111

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

8 High

AI Score

Confidence

Low

0.002 Low

EPSS

Percentile

64.9%