PHP up to 5.6.30/7.0.20/7.1.6 OpenSSL Extension ext/openssl/openssl.c Negative Number unusual condition

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in PHP up to 5.6.30/7.0.20/7.1.6. This impacts an unknown function of the file ext/openssl/openssl.c of the component OpenSSL Extension. Such manipulation as part of Negative Number leads to unusual condition. This vulnerability is documented as CVE-2017-11144. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in PHP up to 5.6.30/7.0.20/7.1.6 (Programming Language Software). Affected by this issue is an unknown function of the file ext/openssl/openssl.c of the component OpenSSL Extension. The manipulation as part of a Negative Number leads to a unusual condition vulnerability. Using CWE to declare the problem leads to CWE-754. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. Impacted is availability. CVE summarizes:

In PHP before 5.6.31, 7.x before 7.0.21, and 7.1.x before 7.1.7, the openssl extension PEM sealing code did not check the return value of the OpenSSL sealing function, which could lead to a crash of the PHP interpreter, related to an interpretation conflict for a negative number in ext/openssl/openssl.c, and an OpenSSL documentation omission.

The bug was discovered 07/05/2017. The weakness was released 07/10/2017 as confirmed git commit (GIT Repository). The advisory is shared for download at git.php.net. This vulnerability is handled as CVE-2017-11144 since 07/10/2017. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 101908 (Debian DLA-1034-1 : 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 196874 (Ubuntu Security Notification for Php5, Php7.0 Vulnerabilities (USN-3382-1)).

Upgrading to version 5.6.31, 7.0.21 or 7.1.7 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.php.net. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (101908). Entries connected to this vulnerability are available at VDB-97454, VDB-103373, VDB-103375 and VDB-103377. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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: Unusual condition
CWE: CWE-754
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: 101908
Nessus Name: Debian DLA-1034-1 : php5 security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103043
OpenVAS Name: PHP Multiple Vulnerabilities - Jul17 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: PHP 5.6.31/7.0.21/7.1.7
Patch: 73cabfedf519298e1a11192699f44d53c529315e

Timelineinfo

07/05/2017 🔍
07/10/2017 +5 days 🔍
07/10/2017 +0 days 🔍
07/10/2017 +0 days 🔍
07/11/2017 +1 days 🔍
07/21/2017 +10 days 🔍
07/24/2017 +3 days 🔍
12/12/2022 +1967 days 🔍

Sourcesinfo

Product: php.org

Advisory: RHSA-2018:1296
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-11144 (🔍)
GCVE (CVE): GCVE-0-2017-11144
GCVE (VulDB): GCVE-100-103376

OVAL: 🔍
See also: 🔍

Entryinfo

Created: 07/11/2017 12:45
Updated: 12/12/2022 09:28
Changes: 07/11/2017 12:45 (79), 10/24/2019 16:15 (3), 12/12/2022 09:28 (5)
Complete: 🔍
Cache ID: 216::103

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