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
7.5 High
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
0.006 Low
EPSS
Percentile
77.8%
A vulnerability in the email attachment scanning functionality of the Advanced Malware Protection
(AMP) 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 handling of UU-encoded files that are attached to an email
message. An attacker could exploit this vulnerability by sending a crafted email message with a UU-
encoded file attachment through an affected device. The scanning of the attachment could cause the
mail handling process of the affected software to restart, resulting in a DoS condition. After the
mail handling process restarts, the software resumes scanning for the same attachment, which could
cause the mail handling process to 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("1.3.6.1.4.1.25623.1.0.140028");
script_cve_id("CVE-2016-1486");
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("2023-07-21T05:05:22+0000");
script_name("Cisco Email Security Appliance Advanced Malware Protection Attachment Scanning Denial of Service Vulnerability");
script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161026-esa2");
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 attachment scanning functionality of the Advanced Malware Protection
(AMP) 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 handling of UU-encoded files that are attached to an email
message. An attacker could exploit this vulnerability by sending a crafted email message with a UU-
encoded file attachment through an affected device. The scanning of the attachment could cause the
mail handling process of the affected software to restart, resulting in a DoS condition. After the
mail handling process restarts, the software resumes scanning for the same attachment, which could
cause the mail handling process to 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:"2023-07-21 05:05:22 +0000 (Fri, 21 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 14:13:14 +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(
'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',
'9.1.1-000',
'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' );
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 );
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
7.5 High
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
0.006 Low
EPSS
Percentile
77.8%