Apache HTTP Server up to 1.7.1 sec_filter_out heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

A vulnerability has been found in Apache HTTP Server up to 1.7.1 (Web Server) and classified as critical. Affected by this vulnerability is the function sec_filter_out. The manipulation 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. The summary by CVE is:

Heap-based buffer overflow in the sec_filter_out function in mod_security 1.7RC1 through 1.7.1 in Apache 2 allows remote attackers to execute arbitrary code via a server side script that sends a large amount of data.

The weakness was published 10/28/2003 by Adam Dyga with ADSystems (Website). It is possible to read the advisory at adsystems.com.pl. This vulnerability is known as CVE-2003-1171 since 05/04/2005. Access to the local network is required for this attack. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit at adsystems.com.pl. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k.

Upgrading to version 1.7.2 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at adsystems.com.pl. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at X-Force (13543). Additional details are provided at heise.de.

Productinfo

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Support

  • end of life (old version)

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: No
Remote: Partially

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

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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: HTTP Server 1.7.2
Patch: adsystems.com.pl

Timelineinfo

10/28/2003 🔍
10/28/2003 +0 days 🔍
10/28/2003 +0 days 🔍
10/29/2003 +1 days 🔍
10/29/2003 +0 days 🔍
12/31/2003 +62 days 🔍
05/04/2005 +490 days 🔍
04/16/2019 +5095 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: adsystems.com.pl
Researcher: Adam Dyga
Organization: ADSystems
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2003-1171 (🔍)
X-Force: 13543 - ModSecurity sec_filter_out function buffer overflow, High Risk
SecurityTracker: 1008025 - mod_security Buffer Overflow in sec_filter_out() Lets Local Users Execute Arbitrary Code
SecurityFocus: 8919 - Apache Mod_Security Module Heap Corruption Vulnerability
Secunia: 10085 - mod_security Server Output Buffer Overflow, Less Critical
OSVDB: 2725 - ModSecurity (mod_security) sec_filter_out Function Remote Overflow

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

Entryinfo

Created: 10/29/2003 15:01
Updated: 04/16/2019 15:10
Changes: 10/29/2003 15:01 (82), 04/16/2019 15:10 (4)
Complete: 🔍

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