PHP up to 5.5.34/5.6.20/7.0.5 grapheme_string.c grapheme_strpos out-of-bounds

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

Summaryinfo

A vulnerability was found in PHP up to 5.5.34/5.6.20/7.0.5. It has been classified as critical. The impacted element is the function grapheme_strpos of the file ext/intl/grapheme/grapheme_string.c. This manipulation causes out-of-bounds. The identification of this vulnerability is CVE-2016-4541. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as very critical was found in PHP up to 5.5.34/5.6.20/7.0.5 (Programming Language Software). Affected by this vulnerability is the function grapheme_strpos of the file ext/intl/grapheme/grapheme_string.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The grapheme_strpos function in ext/intl/grapheme/grapheme_string.c in 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 (out-of-bounds read) or possibly have unspecified other impact via a negative offset.

The weakness was shared 05/22/2016 (Website). The advisory is shared at php.net. This vulnerability is known as CVE-2016-4541 since 05/05/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k 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 90172†). The entries VDB-67396, VDB-67398, VDB-67420 and VDB-67724 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: fd9689745c44341b1bd6af4756f324be8abba2fb

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: 72061
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4541 (🔍)
GCVE (CVE): GCVE-0-2016-4541
GCVE (VulDB): GCVE-100-87589

OVAL: 🔍

SecurityFocus: 90172 - PHP 'grapheme_string.c' Out of Bounds Read Local Memory Corruption Vulnerabilities

See also: 🔍

Entryinfo

Created: 05/23/2016 10:34
Updated: 08/22/2022 07:28
Changes: 05/23/2016 10:34 (68), 12/10/2018 08:17 (14), 08/22/2022 07:21 (6), 08/22/2022 07:28 (1)
Complete: 🔍
Cache ID: 216::103

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