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
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
77.8%
A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email
Security Appliances could allow an unauthenticated, remote attacker to cause an affected device to
stop scanning and forwarding email messages due to a denial of service (DoS) condition.
The vulnerability is due to improper input validation of email attachments that have corrupted
fields. An attacker could exploit this vulnerability by sending a crafted email message, which has
an attachment with corrupted fields, through an affected device. When the affected software filters
the attachment, the filtering process could crash and restart, resulting in a DoS condition. After
the filtering process restarts, the software resumes filtering for the same attachment, causing the
filtering process to crash and restart again. A successful exploit could allow the attacker to cause
a repeated DoS condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that
address this vulnerability.
# SPDX-FileCopyrightText: 2016 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
CPE = "cpe:/h:cisco:email_security_appliance";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.140027");
script_cve_id("CVE-2016-6356");
script_tag(name:"cvss_base", value:"7.8");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_version("2023-07-20T05:05:17+0000");
script_name("Cisco Email Security Appliance Corrupted Attachment Fields Denial of Service Vulnerability");
script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161026-esa3");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");
script_tag(name:"summary", value:"A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email
Security Appliances could allow an unauthenticated, remote attacker to cause an affected device to
stop scanning and forwarding email messages due to a denial of service (DoS) condition.
The vulnerability is due to improper input validation of email attachments that have corrupted
fields. An attacker could exploit this vulnerability by sending a crafted email message, which has
an attachment with corrupted fields, through an affected device. When the affected software filters
the attachment, the filtering process could crash and restart, resulting in a DoS condition. After
the filtering process restarts, the software resumes filtering for the same attachment, causing the
filtering process to crash and restart again. A successful exploit could allow the attacker to cause
a repeated DoS condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that
address this vulnerability.");
script_tag(name:"qod_type", value:"package");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2017-07-29 01:34:00 +0000 (Sat, 29 Jul 2017)");
script_tag(name:"creation_date", value:"2016-10-27 14:11:57 +0200 (Thu, 27 Oct 2016)");
script_category(ACT_GATHER_INFO);
script_family("CISCO");
script_copyright("Copyright (C) 2016 Greenbone AG");
script_dependencies("gb_cisco_esa_version.nasl");
script_mandatory_keys("cisco_esa/installed");
exit(0);
}
include("host_details.inc");
include("version_func.inc");
if( ! version = get_app_version( cpe:CPE ) ) exit( 0 );
affected = make_list(
'3.3.1-09',
'7.1.0',
'7.1.1',
'7.1.2',
'7.1.3',
'7.1.4',
'7.1.5',
'7.3.0',
'7.3.1',
'7.3.2',
'7.5.0',
'7.5.1',
'7.5.2',
'7.5.2-201',
'7.6.0',
'7.6.1-000',
'7.6.1-gpl-022',
'7.6.2',
'7.6.3-000',
'7.6.3-025',
'7.7.0-000',
'7.7.1-000',
'7.8.0',
'7.8.0-311',
'8.0.0',
'8.0.1-023',
'8.5.0-000',
'8.5.0-ER1-198',
'8.5.6-052',
'8.5.6-073',
'8.5.6-074',
'8.5.6-106',
'8.5.6-113',
'8.5.7-042',
'8.6.0',
'8.6.0-011',
'8.9.0',
'8.9.1-000',
'8.9.2-032',
'9.0.0',
'9.0.0-212',
'9.0.0-461',
'9.0.5-000',
'9.1.0',
'9.1.0-011',
'9.1.0-101',
'9.1.0-032',
'9.4.0',
'9.4.4-000',
'9.5.0-000',
'9.5.0-201',
'9.6.0-000',
'9.6.0-042',
'9.6.0-051',
'9.7.0-125',
'9.7.1-066' );
foreach af ( affected )
{
if( version == af )
{
report = report_fixed_ver( installed_version:version, fixed_version: "See advisory" );
security_message( port:0, data:report );
exit( 0 );
}
}
exit( 99 );
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
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
77.8%