Cisco IOS/IOS XE/IOS XR IKEv1 Memory information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS, IOS XE and IOS XR. It has been rated as problematic. The impacted element is an unknown function of the component IKEv1 Handler. The manipulation leads to information disclosure (Memory). This vulnerability is uniquely identified as CVE-2016-6415. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability was found in Cisco IOS, IOS XE and IOS XR (Router Operating System) (version unknown). It has been rated as problematic. This issue affects an unknown function of the component IKEv1 Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (Memory). Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The advisory summarizes:

Configuring IKEv2 on Cisco IOS Software or Cisco IOS XE Software automatically enables IKEv1.

The bug was discovered 09/16/2016. The weakness was disclosed 09/16/2016 by Shadow with Shadow Brokers as cisco-sa-20160916-ikev1 / CSCvb29204 / CSCvb36055 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2016-6415 since 07/26/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue. The advisory points out:

A vulnerability in IKEv1 packet processing code in Cisco IOS, Cisco IOS XE and Cisco IOS XR Software could allow an unauthenticated, remote attacker to retrieve memory contents, which could lead to the disclosure of confidential information.

The exploit is available at exploit-db.com. It is declared as attacked. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 93736 (Cisco IOS IKEv1 Packet Handling Remote Information Disclosure (cisco-sa-20160916-ikev1) (BENIGNCERTAIN)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316024 (Cisco IOS IKEv1 Information Disclosure Vulnerability (cisco-sa-20160916-ikev1)). The advisory illustrates:

The vulnerability is due to insufficient condition checks in the part of the code that handles IKEv1 security negotiation requests. An attacker could exploit this vulnerability by sending a crafted IKEv1 packet to an affected device configured to accept IKEv1 security negotiation requests. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information.
The CISA Known Exploited Vulnerabilities Catalog lists this issue since 05/19/2023 with a due date of 06/09/2023:
Apply updates per vendor instructions.

Addressing this vulnerability is possible by firewalling udp/500, udp/848, udp/4500, udp/4848. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

The preferred method to determine if a device has been configured for IKE is to issue the show ip sockets or show udp EXEC command.
Attack attempts may be identified with Snort ID 40220.

The vulnerability is also documented in the databases at Exploit-DB (43383), Zero-Day.cz (260), Tenable (93736), SecurityFocus (BID 93003†) and SecurityTracker (ID 1036841†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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Exploitinginfo

Name: Memory
Class: Information disclosure / Memory
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

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KEV Ransomware: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 93736
Nessus Name: Cisco IOS IKEv1 Packet Handling Remote Information Disclosure (cisco-sa-20160916-ikev1) (BENIGNCERTAIN)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 855426
OpenVAS Name: Cisco IOS Software IKEv1 Information Disclosure Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: cisco_ike_benigncertain.rb
MetaSploit Name: Cisco IKE Information Disclosure
MetaSploit File: 🔍

Exploit-DB: 🔍
Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Firewalling: 🔍

Snort ID: 40220
Snort Message: SERVER-OTHER Cisco IOS Group-Prime memory disclosure exfiltration attempt
Snort Class: 🔍

Suricata ID: 2023311
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Suricata Message: 🔍

Timelineinfo

07/26/2016 🔍
09/16/2016 +52 days 🔍
09/16/2016 +0 days 🔍
09/16/2016 +0 days 🔍
09/16/2016 +0 days 🔍
09/16/2016 +0 days 🔍
09/18/2016 +2 days 🔍
09/18/2016 +0 days 🔍
09/27/2016 +9 days 🔍
01/27/2025 +3044 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20160916-ikev1 / CSCvb29204 / CSCvb36055
Researcher: Shadow
Organization: Shadow Brokers
Status: Confirmed

CVE: CVE-2016-6415 (🔍)
GCVE (CVE): GCVE-0-2016-6415
GCVE (VulDB): GCVE-100-91637

OVAL: 🔍

SecurityFocus: 93003 - Multiple Cisco Products CVE-2016-6415 Information Disclosure Vulnerability
SecurityTracker: 1036841

scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 09/18/2016 09:49
Updated: 01/27/2025 22:39
Changes: 09/18/2016 09:49 (96), 09/03/2019 16:13 (9), 09/16/2022 19:17 (3), 04/28/2024 17:08 (24), 07/07/2024 06:59 (2), 09/09/2024 22:30 (1), 01/27/2025 22:39 (1)
Complete: 🔍
Cache ID: 216::103

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