VDB-1500 · CVE-2005-1717 · BID 13703

ZyXEL ZyNOS up to 3.40 GT.5 IP Fragmentation denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in ZyXEL ZyNOS up to 3.40 GT.5. This issue affects some unknown processing of the component IP Fragmentation Handler. The manipulation results in denial of service. This vulnerability is known as CVE-2005-1717. Attacking locally is a requirement. Furthermore, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in ZyXEL ZyNOS up to 3.40 GT.5. It has been classified as problematic. Affected is some unknown functionality of the component IP Fragmentation Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

ZyXEL Prestige 650R-31 router running ZyNOS FW v3.40(KO.1) allows remote attackers to cause a denial of service (CPU consumption and network loss) via crafted fragmented IP packets.

The bug was discovered 05/02/2005. The weakness was published 05/24/2005 by Federico Kirschbaum (Website). The advisory is shared for download at secunia.com. This vulnerability is traded as CVE-2005-1717 since 05/24/2005. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. Technical details are unknown but an exploit is available.

An exploit has been developed in ANSI C and been published immediately after the advisory. The exploit is shared for download at packetstorm.linuxsecurity.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 22 days. During that time the estimated underground price was around $0-$5k.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at zyxel.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at SecurityFocus (BID 13703†), OSVDB (16779†) and Secunia (SA15463†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 5.6

VulDB Base Score: 6.2
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Patch: zyxel.com

Timelineinfo

05/02/2005 🔍
05/20/2005 +18 days 🔍
05/24/2005 +4 days 🔍
05/24/2005 +0 days 🔍
05/24/2005 +0 days 🔍
05/24/2005 +0 days 🔍
05/24/2005 +0 days 🔍
06/01/2005 +7 days 🔍
07/03/2019 +5145 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: secunia.com⛔
Researcher: Federico Kirschbaum
Status: Not defined

CVE: CVE-2005-1717 (🔍)
GCVE (CVE): GCVE-0-2005-1717
GCVE (VulDB): GCVE-100-1500
SecurityFocus: 13703 - Zyxel Prestige 650R-31 Router Remote Denial of Service Vulnerability
Secunia: 15463 - ZyXEL ZyNOS Fragmented IP Packets Denial of Service, Not Critical
OSVDB: 16779 - ZyXEL ZyNOS Fragmented IP Packet Saturation DoS

Entryinfo

Created: 06/01/2005 14:33
Updated: 07/03/2019 09:49
Changes: 06/01/2005 14:33 (62), 07/03/2019 09:49 (9)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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