PHP up to 5.5.34/5.6.20/7.0.5 XML ext/xml/xml.c xml_parse_into_struct second memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in PHP up to 5.5.34/5.6.20/7.0.5 and classified as critical. Impacted is the function xml_parse_into_struct of the file ext/xml/xml.c of the component XML Handler. The manipulation of the argument second leads to memory corruption. This vulnerability is uniquely identified as CVE-2016-4539. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in PHP up to 5.5.34/5.6.20/7.0.5 (Programming Language Software). It has been rated as very critical. This issue affects the function xml_parse_into_struct of the file ext/xml/xml.c of the component XML Handler. The manipulation of the argument second with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The xml_parse_into_struct function in ext/xml/xml.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 allows remote attackers to cause a denial of service (buffer under-read and segmentation fault) or possibly have unspecified other impact via crafted XML data in the second argument, leading to a parser level of zero.

The weakness was disclosed 05/22/2016 (Website). It is possible to read the advisory at php.net. The identification of this vulnerability is CVE-2016-4539 since 05/05/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD at the moment (estimation calculated on 08/22/2022).

The vulnerability scanner Nessus provides a plugin with the ID 91397 (Debian DLA-499-1 : php5 security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 11623 (PHP Versions Prior to 5.6.21/5.5.35 Multiple Vulnerabilities).

Upgrading to version 5.5.35, 5.6.21 or 7.0.6 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (91397) and SecurityFocus (BID 90174†). The entries VDB-67396, VDB-67398, VDB-67420 and VDB-67724 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91397
Nessus Name: Debian DLA-499-1 : php5 security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 63997
OpenVAS Name: Ubuntu Update for php7.0 USN-2984-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Upgrade: PHP 5.5.35/5.6.21/7.0.6
Patch: dccda88f27a084bcbbb30198ace12b4e7ae961cc

Timelineinfo

05/05/2016 🔍
05/06/2016 +1 days 🔍
05/21/2016 +15 days 🔍
05/22/2016 +1 days 🔍
05/23/2016 +1 days 🔍
05/31/2016 +8 days 🔍
06/01/2016 +1 days 🔍
08/22/2022 +2273 days 🔍

Sourcesinfo

Product: php.org

Advisory: 72099
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4539 (🔍)
GCVE (CVE): GCVE-0-2016-4539
GCVE (VulDB): GCVE-100-87587

OVAL: 🔍

SecurityFocus: 90174 - PHP CVE-2016-4539 Remote Denial Of Service Vulnerability

See also: 🔍

Entryinfo

Created: 05/23/2016 10:33
Updated: 08/22/2022 06:50
Changes: 05/23/2016 10:33 (71), 12/10/2018 08:16 (13), 08/22/2022 06:38 (5), 08/22/2022 06:50 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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