CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.0 | $0-$5k | 0.00 |
A vulnerability classified as critical has been found in Cisco IOS 8.2/8.3/9.0/9.1 (Router Operating System). This affects an unknown part of the component Access List Handler. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:
Vulnerability in Cisco routers versions 8.2 through 9.1 allows remote attackers to bypass access control lists when extended IP access lists are used on certain interfaces, the IP route cache is enabled, and the access list uses the "established" keyword.
The weakness was presented 12/10/1992 as CSCdi34061 as confirmed advisory (Website). The advisory is shared at cert.org. This vulnerability is uniquely identified as CVE-1999-1466. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.
The vulnerability scanner Nessus provides a plugin with the ID 10973 (Cisco IOS established Keyword ACL Bypass (CSCdi34061)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO.
Upgrading to version 8.3, 9.0 or 9.1 eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting no ip route-cache
. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.
The vulnerability is also documented in the databases at X-Force (1248) and Tenable (10973). See 13652 and 14213 for similar entries.
Product
Type
Vendor
Name
Version
License
Support
- end of life (old version)
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
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CVSSv3
VulDB Meta Base Score: 7.3VulDB Meta Temp Score: 7.0
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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Exploiting
Class: Privileges managementCWE: CWE-269 / CWE-266
ATT&CK: T1068
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Nessus ID: 10973
Nessus Name: Cisco IOS established Keyword ACL Bypass (CSCdi34061)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: IOS 8.3/9.0/9.1
Config: no ip route-cache
Timeline
12/10/1992 🔍12/10/1992 🔍
12/10/1992 🔍
12/10/1992 🔍
09/01/1998 🔍
09/09/2003 🔍
06/17/2014 🔍
06/23/2021 🔍
Sources
Vendor: cisco.comAdvisory: CSCdi34061
Status: Confirmed
CVE: CVE-1999-1466 (🔍)
X-Force: 1248 - Cisco IOS access control list using the \
Vulnerability Center: 2058 - [cisco-sa-19950601-key-packet-bypass] Cisco IOS established Keyword Allows Filtering Bypass, Low
SecurityFocus: 53 - Cisco Access List Vulnerability
See also: 🔍
Entry
Created: 06/17/2014 12:34Updated: 06/23/2021 00:51
Changes: 06/17/2014 12:34 (64), 01/13/2018 12:44 (6), 06/23/2021 00:51 (4)
Complete: 🔍
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