Fedora 31 : sudo (2020-8b563bc5f4)

2020-03-06T00:00:00
ID FEDORA_2020-8B563BC5F4.NASL
Type nessus
Reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-03-06T00:00:00

Description

  • update to latest development version 1.9.0b1

  • added sudo_logsrvd and sudo_sendlog to files and their appropriate man pages Resolves: rhbz#1787823

  • Stack based buffer overflow in when pwfeedback is enabled Resolves: rhbz#1796945

  • fixes: CVE-2019-18634

  • By using ! character in the shadow file instead of a password hash can access to a run as all sudoer account Resolves: rhbz#1786709

  • fixes CVE-2019-19234

  • attacker with access to a Runas ALL sudoer account can impersonate a nonexistent user Resolves: rhbz#1786705

  • fixes CVE-2019-19232

  • setrlimit(RLIMIT_CORE): Operation not permitted warning message fix Resolves: rhbz#1773148

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2020-8b563bc5f4.
#

include("compat.inc");

if (description)
{
  script_id(134253);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/10");

  script_cve_id("CVE-2019-18634", "CVE-2019-19232", "CVE-2019-19234");
  script_xref(name:"FEDORA", value:"2020-8b563bc5f4");

  script_name(english:"Fedora 31 : sudo (2020-8b563bc5f4)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"  - update to latest development version 1.9.0b1

  - added sudo_logsrvd and sudo_sendlog to files and their
    appropriate man pages Resolves: rhbz#1787823

  - Stack based buffer overflow in when pwfeedback is
    enabled Resolves: rhbz#1796945

  - fixes: CVE-2019-18634 

  - By using ! character in the shadow file instead of a
    password hash can access to a run as all sudoer account
    Resolves: rhbz#1786709

  - fixes CVE-2019-19234

  - attacker with access to a Runas ALL sudoer account can
    impersonate a nonexistent user Resolves: rhbz#1786705

  - fixes CVE-2019-19232

  - setrlimit(RLIMIT_CORE): Operation not permitted warning
    message fix Resolves: rhbz#1773148

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bodhi.fedoraproject.org/updates/FEDORA-2020-8b563bc5f4"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected sudo package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-19234");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:sudo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:31");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^31([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 31", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC31", reference:"sudo-1.9.0-0.1.b1.fc31")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "sudo");
}