PHP up to 5.6.36/7.0.30/7.1.19/7.2.7 exif.c exif_thumbnail_extract integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in PHP up to 5.6.36/7.0.30/7.1.19/7.2.7. This affects the function exif_thumbnail_extract of the file exif.c. The manipulation results in integer overflow. This vulnerability is reported as CVE-2018-14883. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in PHP up to 5.6.36/7.0.30/7.1.19/7.2.7 (Programming Language Software). Affected is the function exif_thumbnail_extract of the file exif.c. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in PHP before 5.6.37, 7.0.x before 7.0.31, 7.1.x before 7.1.20, and 7.2.x before 7.2.8. An Integer Overflow leads to a heap-based buffer over-read in exif_thumbnail_extract of exif.c.

The bug was discovered 07/19/2018. The weakness was disclosed 08/03/2018 (Website). The advisory is shared for download at php.net. This vulnerability is traded as CVE-2018-14883 since 08/03/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 112093 (Amazon Linux AMI : php56 / php70,php71 (ALAS-2018-1066)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351345 (Amazon Linux Security Advisory for php72: ALAS-2018-1067).

Upgrading to version 5.6.37, 7.0.31, 7.1.20 or 7.2.8 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (112093) and SecurityFocus (BID 104871†). The entries VDB-67396, VDB-67398, VDB-67420 and VDB-67724 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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: Integer overflow
CWE: CWE-190 / CWE-189
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: 112093
Nessus Name: Amazon Linux AMI : php56 / php70,php71 (ALAS-2018-1066)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: PHP 5.6.37/7.0.31/7.1.20/7.2.8

Timelineinfo

07/19/2018 🔍
07/19/2018 +0 days 🔍
08/03/2018 +14 days 🔍
08/03/2018 +0 days 🔍
08/03/2018 +0 days 🔍
08/04/2018 +1 days 🔍
08/23/2018 +19 days 🔍
08/24/2018 +1 days 🔍
04/29/2023 +1709 days 🔍

Sourcesinfo

Product: php.org

Advisory: USN-3766-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-14883 (🔍)
GCVE (CVE): GCVE-0-2018-14883
GCVE (VulDB): GCVE-100-122592

OVAL: 🔍

SecurityFocus: 104871 - PHP Multiple Heap Buffer Overflow Vulnerabilities

See also: 🔍

Entryinfo

Created: 08/04/2018 08:25
Updated: 04/29/2023 14:53
Changes: 08/04/2018 08:25 (77), 03/13/2020 09:55 (5), 04/29/2023 14:53 (4)
Complete: 🔍
Cache ID: 216::103

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