mod_ssl 2.8.9 Hook ssl_compat_directive off-by-one

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in mod_ssl 2.8.9. This issue affects the function ssl_compat_directive of the component Hook Handler. The manipulation leads to off-by-one. This vulnerability is uniquely identified as CVE-2002-0653. Moreover, an exploit is present. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in mod_ssl 2.8.9. This issue affects the function ssl_compat_directive of the component Hook Handler. The manipulation with an unknown input leads to a off-by-one vulnerability. Using CWE to declare the problem leads to CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Off-by-one buffer overflow in the ssl_compat_directive function, as called by the rewrite_command hook for mod_ssl Apache module 2.8.9 and earlier, allows local users to execute arbitrary code as the Apache server user via .htaccess files with long entries.

The weakness was disclosed 07/11/2002 (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2002-0653. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 13951 (Mandrake Linux Security Advisory : mod_ssl (MDKSA-2002:048)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 87178 (Apache HTTP Server Mod_SSL Off-By-One Buffer Overflow Vulnerability).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (9415), Exploit-DB (21575), Tenable (13951), SecurityFocus (BID 5084†) and Vulnerability Center (SBV-1313†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

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Nessus ID: 13951
Nessus Name: Mandrake Linux Security Advisory : mod_ssl (MDKSA-2002:048)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 53851
OpenVAS Name: Debian Security Advisory DSA 135-1 (libapache-mod-ssl)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

06/22/2002 🔍
06/22/2002 +0 days 🔍
07/11/2002 +19 days 🔍
07/11/2002 +0 days 🔍
08/08/2002 +28 days 🔍
06/26/2003 +322 days 🔍
07/31/2004 +401 days 🔍
07/11/2014 +3632 days 🔍
09/14/2025 +4083 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed

CVE: CVE-2002-0653 (🔍)
GCVE (CVE): GCVE-0-2002-0653
GCVE (VulDB): GCVE-100-18407
X-Force: 9415
SecurityFocus: 5084 - Mod_SSL Off-By-One HTAccess Buffer Overflow Vulnerability
Vulnerability Center: 1313 - Buffer Overflow in Apache mod_ssl < 2.8.9 Allows Execution of Arbitrary Code, Low

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

Entryinfo

Created: 07/11/2014 14:24
Updated: 09/14/2025 21:27
Changes: 07/11/2014 14:24 (67), 05/10/2019 11:42 (4), 10/24/2024 15:29 (19), 12/18/2024 12:32 (11), 09/14/2025 21:27 (2)
Complete: 🔍
Cache ID: 216::103

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