7.8 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.107 Low
EPSS
Percentile
95.1%
The remote AIX host has a version of OpenSSH installed that is affected by the following vulnerabilities :
An elevation of privilege vulnerability exists in the do_setup_env() function within file session.c when handling user-supplied environmental variables. A local attacker can exploit this to gain elevated privileges by triggering a crafted environment for the /bin/login program. This vulnerability requires that the UseLogin feature is enabled and that PAM is configured to read .pam_environment files in user home directories.
(CVE-2015-8325)
A flaw exists when handling authentication requests that involve overly long passwords due to returning shorter response times for requests for invalid users than for valid users. An unauthenticated, remote attacker can exploit this to enumerate valid usernames by conducting a timing attack. (CVE-2016-6210)
A denial of service vulnerability exists in the auth_password() function within auth-passwd.c due to a a failure to limit password lengths. An unauthenticated, remote attacker can exploit this, via overly long passwords, to cause the excessive consumption of CPU resources. (CVE-2016-6515)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(95477);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/21");
script_cve_id(
"CVE-2015-8325",
"CVE-2016-6210",
"CVE-2016-6515"
);
script_bugtraq_id(
86187,
91812,
92212
);
script_xref(name:"EDB-ID", value:"40113");
script_xref(name:"EDB-ID", value:"40136");
script_name(english:"AIX OpenSSH Advisory : openssh_advisory9.asc");
script_summary(english:"Checks the version of the OpenSSH packages and iFixes.");
script_set_attribute(attribute:"synopsis", value:
"The remote AIX host has a version of OpenSSH installed that is
affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The remote AIX host has a version of OpenSSH installed that is
affected by the following vulnerabilities :
- An elevation of privilege vulnerability exists in the
do_setup_env() function within file session.c when
handling user-supplied environmental variables. A local
attacker can exploit this to gain elevated privileges by
triggering a crafted environment for the /bin/login
program. This vulnerability requires that the UseLogin
feature is enabled and that PAM is configured to read
.pam_environment files in user home directories.
(CVE-2015-8325)
- A flaw exists when handling authentication requests that
involve overly long passwords due to returning shorter
response times for requests for invalid users than for
valid users. An unauthenticated, remote attacker can
exploit this to enumerate valid usernames by conducting
a timing attack. (CVE-2016-6210)
- A denial of service vulnerability exists in the
auth_password() function within auth-passwd.c due to a
a failure to limit password lengths. An unauthenticated,
remote attacker can exploit this, via overly long
passwords, to cause the excessive consumption of CPU
resources. (CVE-2016-6515)");
script_set_attribute(attribute:"see_also", value:"https://aix.software.ibm.com/aix/efixes/security/openssh_advisory9.asc");
script_set_attribute(attribute:"solution", value:
"A fix is available and can be downloaded from the IBM AIX website.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
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:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
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:"2016/04/13");
script_set_attribute(attribute:"patch_publication_date", value:"2016/09/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/02");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix");
script_set_attribute(attribute:"cpe", value:"cpe:/a:openbsd:openssh");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"AIX Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2016-2023 Tenable Network Security, Inc.");
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("Host/AIX/version");
if (isnull(oslevel)) audit(AUDIT_UNKNOWN_APP_VER, "AIX");
if ( oslevel != "AIX-5.3" && oslevel != "AIX-6.1" && oslevel != "AIX-7.1" && oslevel != "AIX-7.2" )
{
oslevel = ereg_replace(string:oslevel, pattern:"-", replace:" ");
audit(AUDIT_OS_NOT, "AIX 5.3 / 6.1 / 7.1 / 7.2", oslevel);
}
if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING);
if ( get_kb_item("Host/AIX/emgr_failure" ) ) exit(0, "This AIX package check is disabled because : "+get_kb_item("Host/AIX/emgr_failure") );
flag = 0;
ifixes_6202 = "(6202_ifix)";
if (aix_check_ifix(release:"5.3", patch:ifixes_6202, package:"openssh.base.client", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (aix_check_ifix(release:"6.1", patch:ifixes_6202, package:"openssh.base.client", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (aix_check_ifix(release:"7.1", patch:ifixes_6202, package:"openssh.base.client", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (aix_check_ifix(release:"7.2", patch:ifixes_6202, package:"openssh.base.client", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (aix_check_ifix(release:"5.3", patch:ifixes_6202, package:"openssh.base.server", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (aix_check_ifix(release:"6.1", patch:ifixes_6202, package:"openssh.base.server", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (aix_check_ifix(release:"7.1", patch:ifixes_6202, package:"openssh.base.server", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (aix_check_ifix(release:"7.2", patch:ifixes_6202, package:"openssh.base.server", minfilesetver:"4.0.0.5200", maxfilesetver:"6.0.0.6202") < 0) flag++;
if (flag)
{
aix_report_extra = ereg_replace(string:aix_report_get(), pattern:"[()]", replace:"");
aix_report_extra = ereg_replace(string:aix_report_extra, pattern:"[|]", replace:" or ");
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : aix_report_extra
);
}
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");
}
7.8 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.107 Low
EPSS
Percentile
95.1%