Apache HTTP Server up to 2.0.55 HTTP Header Transfer-Encoding

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 classified as critical has been found in Apache HTTP Server up to 2.0.55. Affected by this issue is some unknown functionality of the component HTTP Header Handler. This manipulation of the argument Transfer-Encoding causes an unknown weakness. This vulnerability is handled as CVE-2005-2088. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apache HTTP Server up to 2.0.55 (Web Server) and classified as critical. Affected by this vulnerability is some unknown processing of the component HTTP Header Handler. The manipulation of the argument Transfer-Encoding with an unknown input leads to a unknown weakness. As an impact it is known to affect integrity. The summary by CVE is:

The Apache HTTP server before 1.3.34, and 2.0.x before 2.0.55, when acting as an HTTP proxy, allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with both a "Transfer-Encoding: chunked" header and a Content-Length header, which causes Apache to incorrectly handle and forward the body of the request in a way that causes the receiving server to process it as a separate HTTP request, aka "HTTP Request Smuggling."

The weakness was released 07/26/2005 by Watchfire as confirmed mailinglist post (Bugtraq). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2005-2088 since 06/30/2005. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 21113 (HP-UX PHSS_34204 : HP-UX VirtualVault running Apache 1.3.X Remote Unauthorized Access (HPSBUX02101 SSRT051128 rev.1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family HP-UX Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117891 (CentOS Security Update for httpd (CESA-2005:582)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at httpd.apache.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (21113), SecurityFocus (BID 14106†), Secunia (SA23074†), SecurityTracker (ID 1014323†) and Vulnerability Center (SBV-8781†). Entries connected to this vulnerability are available at VDB-1652, VDB-1839 and VDB-25939. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Web Server

Vendor

• Apache

Name

• HTTP Server

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8
• 2.0.9
• 2.0.10
• 2.0.11
• 2.0.12
• 2.0.13
• 2.0.14
• 2.0.15
• 2.0.16
• 2.0.17
• 2.0.18
• 2.0.19
• 2.0.20
• 2.0.21
• 2.0.22
• 2.0.23
• 2.0.24
• 2.0.25
• 2.0.26
• 2.0.27
• 2.0.28
• 2.0.29
• 2.0.30
• 2.0.31
• 2.0.32
• 2.0.33
• 2.0.34
• 2.0.35
• 2.0.36
• 2.0.37
• 2.0.38
• 2.0.39
• 2.0.40
• 2.0.41
• 2.0.42
• 2.0.43
• 2.0.44
• 2.0.45
• 2.0.46
• 2.0.47
• 2.0.48
• 2.0.49
• 2.0.50
• 2.0.51
• 2.0.52
• 2.0.53
• 2.0.54
• 2.0.55

License

• open-source

Support

• end of life (old version)

Website

• Vendor: https://www.apache.org/

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

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Unknown
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 21113
Nessus Name: HP-UX PHSS_34204 : HP-UX VirtualVault running Apache 1.3.X Remote Unauthorized Access (HPSBUX02101 SSRT051128 rev.1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 55259
OpenVAS Name: Debian Security Advisory DSA 803-1 (apache)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Patch: httpd.apache.org

Timelineinfo

06/29/2005 🔍
06/30/2005 +0 days 🔍
06/30/2005 +0 days 🔍
07/05/2005 +5 days 🔍
07/26/2005 +21 days 🔍
08/02/2005 +7 days 🔍
09/08/2005 +37 days 🔍
03/21/2006 +194 days 🔍
07/10/2024 +6686 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: seclists.org
Researcher: Watchfire
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-2088 (🔍)
GCVE (CVE): GCVE-0-2005-2088
GCVE (VulDB): GCVE-100-1651

OVAL: 🔍

SecurityFocus: 14106
Secunia: 23074 - Novell NetWare Apache HTTP Request Smuggling Vulnerability, Less Critical
SecurityTracker: 1014323 - Apache Chunked Transfer-Encoding and Content-Length Processing Lets Remote Users Smuggle HTTP Requests
Vulnerability Center: 8781
Vupen: ADV-2006-4680

See also: 🔍

Entryinfo

Created: 08/02/2005 11:27
Updated: 07/10/2024 22:21
Changes: 08/02/2005 11:27 (78), 04/16/2019 15:10 (4), 03/11/2021 19:19 (7), 03/11/2021 19:24 (2), 03/11/2021 19:31 (1), 07/10/2024 22:21 (15)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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