PHP up to 4.3.10/5.0.3 on Unix safe_mode_exec_dir memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.8$0-$5k0.00

Summaryinfo

A vulnerability was found in PHP up to 4.3.10/5.0.3 on Unix. It has been rated as problematic. Affected by this issue is the function safe_mode_exec_dir. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2004-1018. The attack is possible to be carried out remotely. Moreover, an exploit is present. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in PHP up to 4.3.10/5.0.3 on Unix (Programming Language Software) and classified as critical. Affected by this vulnerability is the function safe_mode_exec_dir. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Multiple integer handling errors in PHP before 4.3.10 allow attackers to bypass safe mode restrictions, cause a denial of service, or execute arbitrary code via (1) a negative offset value to the shmop_write function, (2) an "integer overflow/underflow" in the pack function, or (3) an "integer overflow/underflow" in the unpack function. NOTE: this issue was originally REJECTed by its CNA before publication, but that decision is in active dispute. This candidate may change significantly in the future as a result of further discussion.

The weakness was disclosed 12/16/2004 by Stefan Esser with isec (Website). The advisory is shared at php.net. This vulnerability is known as CVE-2004-1018 since 11/04/2004. The attack can be launched remotely. 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 securityfocus.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 18091 (Mandrake Linux Security Advisory : php (MDKSA-2005:072)), 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 12144 (PHP Multiple Remote Vulnerabilities).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at php.net. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (18515), Exploit-DB (24854), Tenable (18091), SecurityFocus (BID 12045†) and OSVDB (12411†). Additional details are provided at hardened-php.net. The entries VDB-1060, VDB-1059, VDB-1056 and VDB-1055 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
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Nessus ID: 18091
Nessus Name: Mandrake Linux Security Advisory : php (MDKSA-2005:072)
Nessus File: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Patch: php.net

Timelineinfo

11/04/2004 🔍
12/16/2004 +42 days 🔍
12/16/2004 +0 days 🔍
12/16/2004 +0 days 🔍
12/20/2004 +3 days 🔍
01/03/2005 +14 days 🔍
01/10/2005 +7 days 🔍
04/18/2005 +98 days 🔍
04/19/2005 +1 days 🔍
01/27/2025 +7223 days 🔍

Sourcesinfo

Product: php.org

Advisory: php.net
Researcher: Stefan Esser
Organization: isec
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2004-1018 (🔍)
GCVE (CVE): GCVE-0-2004-1018
GCVE (VulDB): GCVE-100-1057

OVAL: 🔍

X-Force: 18515
SecurityFocus: 12045 - PHP Shared Memory Module Offset Memory Corruption Vulnerability
Secunia: 13481 - PHP Multiple Vulnerabilities, Highly Critical
OSVDB: 12411 - PHP unpack() Function Heap Information Leak

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

Created: 01/03/2005 10:23
Updated: 01/27/2025 13:29
Changes: 01/03/2005 10:23 (88), 06/30/2019 16:34 (3), 01/27/2025 13:29 (18)
Complete: 🔍
Cache ID: 216:2DD:103

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