Apache HTTP Server up to 1.3.32 mod_proxy Content-Length heap-based overflow

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.
6.6	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Apache HTTP Server up to 1.3.32. It has been declared as critical. This affects an unknown part of the component mod_proxy. Executing a manipulation of the argument Content-Length can lead to heap-based overflow. This vulnerability is handled as CVE-2004-0492. The attack can be executed remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apache HTTP Server up to 1.3.32 (Web Server) and classified as critical. This vulnerability affects some unknown processing of the component mod_proxy. The manipulation of the argument Content-Length with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a denial of service (process crash) and possibly execute arbitrary code via a negative Content-Length HTTP header field, which causes a large amount of data to be copied.

The weakness was released 06/10/2004 by Georgi Guninski (Website). The advisory is available at guninski.com. This vulnerability was named CVE-2004-0492 since 05/27/2004. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

After immediately, there has been an exploit disclosed. It is possible to download the exploit at guninski.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 14527 (GLSA-200406-16 : Apache 1.3: Buffer overflow in mod_proxy), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86688 (Sun Solaris Apache Web Server Multiple Vulnerabilities).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at marc.theaimsgroup.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 2580. In this case the pattern Content-Length|3A| is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1597.

The vulnerability is also documented in the databases at X-Force (16387), Tenable (14527), SecurityFocus (BID 10508†), OSVDB (6839†) and Secunia (SA11841†). Additional details are provided at securityfocus.com. Entries connected to this vulnerability are available at VDB-1630, VDB-20195 and VDB-21601. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Web Server

Vendor

• Apache

Name

• HTTP Server

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5
• 1.3.6
• 1.3.7
• 1.3.8
• 1.3.9
• 1.3.10
• 1.3.11
• 1.3.12
• 1.3.13
• 1.3.14
• 1.3.15
• 1.3.16
• 1.3.17
• 1.3.18
• 1.3.19
• 1.3.20
• 1.3.21
• 1.3.22
• 1.3.23
• 1.3.24
• 1.3.25
• 1.3.26
• 1.3.27
• 1.3.28
• 1.3.29
• 1.3.30
• 1.3.31
• 1.3.32

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: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 14527
Nessus Name: GLSA-200406-16 : Apache 1.3: Buffer overflow in mod_proxy
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 15555
OpenVAS Name: Apache mod_proxy content-length buffer overflow
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Patch: marc.theaimsgroup.com

Snort ID: 2580
Snort Message: WEB-MISC server negative Content-Length attempt
Snort Class: 🔍
Snort Pattern: 🔍

Suricata ID: 2102580
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

05/27/2004 🔍
06/10/2004 +14 days 🔍
06/10/2004 +0 days 🔍
06/10/2004 +0 days 🔍
06/10/2004 +0 days 🔍
06/10/2004 +0 days 🔍
06/13/2004 +2 days 🔍
06/14/2004 +1 days 🔍
06/24/2004 +10 days 🔍
08/06/2004 +43 days 🔍
08/30/2004 +24 days 🔍
12/16/2024 +7413 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: guninski.com
Researcher: Georgi Guninski
Status: Confirmed

CVE: CVE-2004-0492 (🔍)
GCVE (CVE): GCVE-0-2004-0492
GCVE (VulDB): GCVE-100-706

OVAL: 🔍

CERT: 🔍
X-Force: 16387 - Apache HTTP Server mod_proxy Content-Length buffer overflow, High Risk
SecurityFocus: 10508 - Apache Mod_Proxy Remote Negative Content-Length Buffer Overflow Vulnerability
Secunia: 11841 - Apache mod_proxy "Content-Length:" Header Buffer Overflow Vulnerability, Highly Critical
OSVDB: 6839 - Apache HTTP Server mod_proxy Content-Length Overflow
Vulnerability Center: 4460 - Buffer Overflow in Apache 1.3.26 – 1.3.31 Mod_Proxy Module, High

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/14/2004 11:53
Updated: 12/16/2024 03:03
Changes: 06/14/2004 11:53 (114), 04/16/2019 15:10 (3), 03/09/2021 14:35 (2), 12/16/2024 03:03 (17)
Complete: 🔍
Cache ID: 216:D65:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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