Cisco IOS 12.x/R12.x TCP Options resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS 12.x/R12.x. This vulnerability affects unknown code of the component TCP Options Handler. This manipulation causes resource management. This vulnerability is tracked as CVE-2010-0577. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco IOS 12.x/R12.x (Router Operating System) and classified as critical. Affected by this vulnerability is an unknown functionality of the component TCP Options Handler. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

Cisco IOS 12.2 through 12.4, when certain PMTUD, SNAT, or window-size configurations are used, allows remote attackers to cause a denial of service (infinite loop, and device reload or hang) via a TCP segment with crafted options, aka Bug ID CSCsz75186.

The weakness was disclosed 03/25/2010 with Cisco (Website). The advisory is shared at cisco.com. This vulnerability is known as CVE-2010-0577 since 02/10/2010. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 49055 (Cisco IOS Software Crafted TCP Packet Denial of Service Vulnerability (cisco-sa-20100324-tcp)), 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 l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43174 (Cisco IOS Software Crafted TCP Packet Denial of Service Vulnerability (cisco-sa-20100324-tcp)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at cisco.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (57129), Tenable (49055), SecurityFocus (BID 38930†), OSVDB (63178†) and Secunia (SA39078†). The entries VDB-4115, VDB-4116, VDB-4114 and VDB-4113 are pretty similar. 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: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 49055
Nessus Name: Cisco IOS Software Crafted TCP Packet Denial of Service Vulnerability (cisco-sa-20100324-tcp)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: cisco.com

Timelineinfo

02/10/2010 🔍
03/24/2010 +42 days 🔍
03/24/2010 +0 days 🔍
03/24/2010 +0 days 🔍
03/24/2010 +0 days 🔍
03/25/2010 +1 days 🔍
03/25/2010 +0 days 🔍
03/25/2010 +0 days 🔍
03/25/2010 +0 days 🔍
04/19/2010 +24 days 🔍
09/01/2010 +135 days 🔍
05/03/2026 +5723 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Organization: Cisco
Status: Confirmed

CVE: CVE-2010-0577 (🔍)
GCVE (CVE): GCVE-0-2010-0577
GCVE (VulDB): GCVE-100-4117
X-Force: 57129 - Cisco IOS TCP segment denial of service, Medium Risk
SecurityFocus: 38930 - Cisco IOS Software Crafted TCP Packet Denial of Service Vulnerability
Secunia: 39078 - Cisco IOS TCP Options Denial of Service Vulnerability, Moderately Critical
OSVDB: 63178 - Cisco IOS TCP Session Establishment Malformed Segment Handling Remote DoS
SecurityTracker: 1023743 - Cisco IOS TCP Option Processing Error Lets Remote Users Deny Service
Vulnerability Center: 25157 - [cisco-sa-20100324-tcp] Cisco IOS Software Remote DoS Vulnerability via Crafted TCP Packets, Medium
Vupen: ADV-2010-0703

See also: 🔍

Entryinfo

Created: 04/19/2010 02:00
Updated: 05/03/2026 09:15
Changes: 04/19/2010 02:00 (82), 02/22/2017 10:47 (10), 03/18/2021 06:41 (3), 02/01/2025 20:08 (16), 05/03/2026 09:15 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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