Yaws Web Server up to 1.79 resource management

HistoryDiffrelatejsonxmlCTI

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.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Yaws Web Server. It has been rated as problematic. This impacts an unknown function. Performing a manipulation results in resource management. This vulnerability is known as CVE-2009-0751. Remote exploitation of the attack is possible. Furthermore, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in Yaws Web Server (Web Server). This affects an unknown function. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

Yaws before 1.80 allows remote attackers to cause a denial of service (memory consumption and crash) via a request with a large number of headers.

The weakness was published 03/02/2009 by Praveen Darshanam (Website). It is possible to read the advisory at yaws.hyber.org. This vulnerability is uniquely identified as CVE-2009-0751 since 03/02/2009. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Praveen Darshanam in Perl and been published 1 days after the advisory. The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 35924 (Debian DSA-1740-1 : yaws - denial of service), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116294 (Debian Update for yaws (DSA-1740-1)).

Upgrading to version 1.50 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (48826), Exploit-DB (8148), Tenable (35924), SecurityFocus (BID 33834†) and Secunia (SA33979†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Web Server

Vendor

Yaws

Name

Web Server

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Praveen Darshanam
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 35924
Nessus Name: Debian DSA-1740-1 : yaws - denial of service
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 63605
OpenVAS Name: Debian Security Advisory DSA 1740-1 (yaws)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Web Server 1.50
Fortigate IPS: 🔍

Timelineinfo

02/12/2009 🔍
02/19/2009 +7 days 🔍
02/20/2009 +1 days 🔍
03/02/2009 +10 days 🔍
03/02/2009 +0 days 🔍
03/02/2009 +0 days 🔍
03/03/2009 +1 days 🔍
03/03/2009 +0 days 🔍
03/16/2009 +13 days 🔍
03/22/2009 +6 days 🔍
03/17/2015 +2186 days 🔍
04/27/2025 +3694 days 🔍

Sourcesinfo

Advisory: yaws.hyber.org
Researcher: Praveen Darshanam
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-0751 (🔍)
GCVE (CVE): GCVE-0-2009-0751
GCVE (VulDB): GCVE-100-46935

OVAL: 🔍

X-Force: 48826
SecurityFocus: 33834 - Yaws Multiple Header Request Denial of Service Vulnerability
Secunia: 33979 - Yaws Request Headers Denial of Service Vulnerability, Less Critical
Vulnerability Center: 21329 - Yaws < 1.80 Remote Denial of Service via a Request with Large Number of Headers, High
Vupen: ADV-2009-0590

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/17/2015 16:11
Updated: 04/27/2025 06:05
Changes: 03/17/2015 16:11 (65), 07/15/2017 16:49 (22), 08/04/2021 19:33 (2), 11/24/2024 14:35 (15), 04/27/2025 06:05 (2)
Complete: 🔍
Cache ID: 216::103