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nessusThis script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.OPENSUSE-2021-304.NASL
HistoryFeb 22, 2021 - 12:00 a.m.

openSUSE Security Update : screen (openSUSE-2021-304)

2021-02-2200:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
11

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

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

9.6 High

AI Score

Confidence

High

0.015 Low

EPSS

Percentile

86.7%

This update for screen fixes the following issues :

  • CVE-2021-26937: Fixed double width combining char handling that could lead to a denial of service or code execution (bsc#1182092).

This update was imported from the SUSE:SLE-15:Update update project.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2021-304.
#
# The text description of this plugin is (C) SUSE LLC.
#

include('compat.inc');

if (description)
{
  script_id(146676);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/19");

  script_cve_id("CVE-2021-26937");

  script_name(english:"openSUSE Security Update : screen (openSUSE-2021-304)");

  script_set_attribute(attribute:"synopsis", value:
"The remote openSUSE host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"This update for screen fixes the following issues :

  - CVE-2021-26937: Fixed double width combining char
    handling that could lead to a denial of service or code
    execution (bsc#1182092).

This update was imported from the SUSE:SLE-15:Update update project.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1182092");
  script_set_attribute(attribute:"solution", value:
"Update the affected screen packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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:H/I:H/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-2021-26937");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/22");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:screen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:screen-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:screen-debugsource");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  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/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE15\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.2", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.2", reference:"screen-4.6.2-lp152.6.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.2", reference:"screen-debuginfo-4.6.2-lp152.6.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.2", reference:"screen-debugsource-4.6.2-lp152.6.3.1") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "screen / screen-debuginfo / screen-debugsource");
}
VendorProductVersionCPE
novellopensusescreenp-cpe:/a:novell:opensuse:screen
novellopensusescreen-debuginfop-cpe:/a:novell:opensuse:screen-debuginfo
novellopensusescreen-debugsourcep-cpe:/a:novell:opensuse:screen-debugsource
novellopensuse15.2cpe:/o:novell:opensuse:15.2

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

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

9.6 High

AI Score

Confidence

High

0.015 Low

EPSS

Percentile

86.7%