PHP up to 4.3.10/5.0.3 unserialize 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 labeled as critical has been found in PHP up to 4.3.10/5.0.3. This issue affects the function unserialize. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2004-1018. It is possible to launch the attack remotely. Furthermore, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in PHP up to 4.3.10/5.0.3 (Programming Language Software). It has been declared as critical. This vulnerability affects the function unserialize. 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. CVE summarizes:

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 published 12/16/2004 by Stefan Esser and Martin Eiszner with isec (Website). The advisory is shared for download at php.net. This vulnerability was named CVE-2004-1018 since 11/04/2004. 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.

It is possible to download the exploit at securityfocus.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 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. Similar entries are available at VDB-1059, VDB-1056, VDB-1055 and VDB-1062. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

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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VulDB Base Score: 🔍
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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
Download: 🔍

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Nessus ID: 18091
Nessus Name: Mandrake Linux Security Advisory : php (MDKSA-2005:072)
Nessus File: 🔍
Nessus Risk: 🔍
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Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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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 🔍
01/31/2025 +7226 days 🔍

Sourcesinfo

Product: php.org

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

CVE: CVE-2004-1018 (🔍)
GCVE (CVE): GCVE-0-2004-1018
GCVE (VulDB): GCVE-100-1060

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
Misc.: 🔍
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Entryinfo

Created: 01/03/2005 10:23
Updated: 01/31/2025 00:12
Changes: 01/03/2005 10:23 (87), 06/30/2019 16:26 (3), 01/31/2025 00:12 (18)
Complete: 🔍
Cache ID: 216:D80:103

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