CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
EPSS
Percentile
82.5%
The version of OpenSSH running on the remote host is affected by a security bypass vulnerability due to a failure to check the refusal deadline during the forwarding of untrusted X11 connections. A remote attacker can exploit this to bypass timeout checks and XSECURITY restrictions.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The text in the description was extracted from AIX Security
# Advisory openssh_advisory4.asc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(85930);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/21");
script_cve_id("CVE-2015-5352");
script_bugtraq_id(75525);
script_name(english:"AIX OpenSSH Vulnerability : openssh_advisory5.asc");
script_summary(english:"Checks the version of the openssh client and server packages.");
script_set_attribute(attribute:"synopsis", value:
"The remote AIX host has a vulnerable version of OpenSSH.");
script_set_attribute(attribute:"description", value:
"The version of OpenSSH running on the remote host is affected by a
security bypass vulnerability due to a failure to check the refusal
deadline during the forwarding of untrusted X11 connections. A remote
attacker can exploit this to bypass timeout checks and XSECURITY
restrictions.");
script_set_attribute(attribute:"see_also", value:"https://aix.software.ibm.com/aix/efixes/security/openssh_advisory5.asc");
script_set_attribute(attribute:"see_also", value:"https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp");
script_set_attribute(attribute:"solution", value:
"A fix is available and can be downloaded from the AIX website.
To extract the fixes from the tar file :
zcat OpenSSH_6.0.0.6110.tar.Z | tar xvf -
(or)
zcat OpenSSH_6.0.0.6201.tar.Z | tar xvf -
IMPORTANT : If possible, it is recommended that an mksysb backup of
the system be created. Verify it is both bootable and readable before
proceeding.
To preview the fix installation :
installp -apYd . OpenSSH_6.0.0.6110
(or)
installp -apYd . OpenSSH_6.0.0.6201
To install the fix package:
installp -aXYd . OpenSSH_6.0.0.6110
(or)
installp -aXYd . OpenSSH_6.0.0.6201");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:5.3");
script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:6.1");
script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:7.1");
script_set_attribute(attribute:"vuln_publication_date", value:"2015/07/01");
script_set_attribute(attribute:"patch_publication_date", value:"2015/09/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/09/14");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2015-2023 Tenable Network Security, Inc.");
script_family(english:"AIX Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/AIX/lslpp", "Host/local_checks_enabled", "Host/AIX/version");
exit(0);
}
include("aix.inc");
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
oslevel = get_kb_item_or_exit("Host/AIX/version");
if ( oslevel != "AIX-5.3" && oslevel != "AIX-6.1" && oslevel != "AIX-7.1" )
{
oslevel = ereg_replace(string:oslevel, pattern:"-", replace:" ");
audit(AUDIT_OS_NOT, "AIX 5.3 / 6.1 / 7.1", oslevel);
}
if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (aix_check_package(release:"5.3", package:"openssh.base.client", minpackagever:"4.0.0.5200", maxpackagever:"6.0.0.6109", fixpackagever:"6.0.0.6110") > 0) flag++;
if (aix_check_package(release:"5.3", package:"openssh.base.client", minpackagever:"6.0.0.6200", maxpackagever:"6.0.0.6200", fixpackagever:"6.0.0.6201") > 0) flag++;
if (aix_check_package(release:"6.1", package:"openssh.base.client", minpackagever:"4.0.0.5200", maxpackagever:"6.0.0.6109", fixpackagever:"6.0.0.6110") > 0) flag++;
if (aix_check_package(release:"6.1", package:"openssh.base.client", minpackagever:"6.0.0.6200", maxpackagever:"6.0.0.6200", fixpackagever:"6.0.0.6201") > 0) flag++;
if (aix_check_package(release:"7.1", package:"openssh.base.client", minpackagever:"4.0.0.5200", maxpackagever:"6.0.0.6109", fixpackagever:"6.0.0.6110") > 0) flag++;
if (aix_check_package(release:"7.1", package:"openssh.base.client", minpackagever:"6.0.0.6200", maxpackagever:"6.0.0.6200", fixpackagever:"6.0.0.6201") > 0) flag++;
if (aix_check_package(release:"5.3", package:"openssh.base.server", minpackagever:"4.0.0.5200", maxpackagever:"6.0.0.6109", fixpackagever:"6.0.0.6110") > 0) flag++;
if (aix_check_package(release:"5.3", package:"openssh.base.server", minpackagever:"6.0.0.6200", maxpackagever:"6.0.0.6200", fixpackagever:"6.0.0.6201") > 0) flag++;
if (aix_check_package(release:"6.1", package:"openssh.base.server", minpackagever:"4.0.0.5200", maxpackagever:"6.0.0.6109", fixpackagever:"6.0.0.6110") > 0) flag++;
if (aix_check_package(release:"6.1", package:"openssh.base.server", minpackagever:"6.0.0.6200", maxpackagever:"6.0.0.6200", fixpackagever:"6.0.0.6201") > 0) flag++;
if (aix_check_package(release:"7.1", package:"openssh.base.server", minpackagever:"4.0.0.5200", maxpackagever:"6.0.0.6109", fixpackagever:"6.0.0.6110") > 0) flag++;
if (aix_check_package(release:"7.1", package:"openssh.base.server", minpackagever:"6.0.0.6200", maxpackagever:"6.0.0.6200", fixpackagever:"6.0.0.6201") > 0) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : aix_report_get()
);
}
else
{
tested = aix_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openssh.base.client / openssh.base.server");
}