PHP up to 7.2.7 ext/exif/exif.c exif_read_data use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in PHP up to 7.2.7 and classified as critical. This issue affects the function exif_read_data of the file ext/exif/exif.c. Performing a manipulation results in use after free. This vulnerability is identified as CVE-2018-12882. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in PHP up to 7.2.7 (Programming Language Software). This affects the function exif_read_data of the file ext/exif/exif.c. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

exif_read_from_impl in ext/exif/exif.c in PHP 7.2.x through 7.2.7 allows attackers to trigger a use-after-free (in exif_read_from_file) because it closes a stream that it is not responsible for closing. The vulnerable code is reachable through the PHP exif_read_data function.

The bug was discovered 06/03/2018. The weakness was released 06/26/2018 (Website). It is possible to read the advisory at bugs.php.net. This vulnerability is uniquely identified as CVE-2018-12882 since 06/25/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 22 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 110940 (Ubuntu 18.04 LTS : php7.2 vulnerability (USN-3702-2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu 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 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 (110940) and SecurityFocus (BID 104551†). Entries connected to this vulnerability are available at VDB-122548 and VDB-122592. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / 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: 110940
Nessus Name: Ubuntu 18.04 LTS : php7.2 vulnerability (USN-3702-2)
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: 🔍

Timelineinfo

06/03/2018 🔍
06/25/2018 +21 days 🔍
06/25/2018 +0 days 🔍
06/25/2018 +0 days 🔍
06/26/2018 +1 days 🔍
06/26/2018 +0 days 🔍
07/05/2018 +9 days 🔍
07/06/2018 +1 days 🔍
03/28/2023 +1726 days 🔍

Sourcesinfo

Product: php.org

Advisory: USN-3702-2
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-12882 (🔍)
GCVE (CVE): GCVE-0-2018-12882
GCVE (VulDB): GCVE-100-119871
SecurityFocus: 104551 - PHP 'ext/exif/exif.c' Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 06/26/2018 10:04
Updated: 03/28/2023 18:44
Changes: 06/26/2018 10:04 (75), 02/21/2020 18:06 (6), 03/28/2023 18:28 (4), 03/28/2023 18:35 (1), 03/28/2023 18:44 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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