Cisco IOS 11.2p/11.3t/12.0/12.0t IP Fragmentation denial of service

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Cisco IOS 11.2p/11.3t/12.0/12.0t. The affected element is an unknown function of the component IP Fragmentation Handler. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-1999-0157. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS 11.2p/11.3t/12.0/12.0t (Router Operating System) and classified as problematic. This issue affects an unknown code of the component IP Fragmentation Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

Cisco PIX firewall and CBAC IP fragmentation attack results in a denial of service.

The bug was discovered 09/10/1998. The weakness was disclosed 08/18/1998 (Website). It is possible to read the advisory at cisco.com. The identification of this vulnerability is CVE-1999-0157. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (1584), SecurityFocus (BID 690†), OSVDB (1097†) and Vulnerability Center (SBV-5894†). The entry VDB-14205 is pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Cisco IOS
  • Cisco PIX

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

08/18/1998 🔍
08/18/1998 +0 days 🔍
08/18/1998 +0 days 🔍
08/19/1998 +1 days 🔍
09/10/1998 +22 days 🔍
02/21/2003 +1625 days 🔍
11/22/2004 +639 days 🔍
06/19/2014 +3496 days 🔍
04/17/2026 +4320 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Status: Confirmed

CVE: CVE-1999-0157 (🔍)
GCVE (CVE): GCVE-0-1999-0157
GCVE (VulDB): GCVE-100-14207

OVAL: 🔍

X-Force: 1584
SecurityFocus: 690 - Cisco PIX and CBAC Fragmentation Attack
OSVDB: 1097 - Cisco PIX / IOS Fragmentation Attack Remote DoS
Vulnerability Center: 5894 - [cisco-sa-19980910-pix-cbac-nifrag] DoS in Cisco PIX and IOS Firewall via IP Fragmentation, Medium

See also: 🔍

Entryinfo

Created: 06/19/2014 17:13
Updated: 04/17/2026 15:26
Changes: 06/19/2014 17:13 (59), 05/26/2019 08:26 (7), 04/17/2026 15:26 (18)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!