PHP up to 5.x/7.2.x ext/imap/php_imap.c imap_mail Message null pointer dereference

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

Summaryinfo

A vulnerability, which was classified as problematic, was found in PHP up to 5.x/7.2.x. This affects the function imap_mail of the file ext/imap/php_imap.c. Executing a manipulation of the argument Message can lead to null pointer dereference. This vulnerability is handled as CVE-2018-19935. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in PHP up to 5.x/7.2.x (Programming Language Software) and classified as problematic. This vulnerability affects the function imap_mail of the file ext/imap/php_imap.c. The manipulation of the argument message with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

ext/imap/php_imap.c in PHP 5.x and 7.x before 7.3.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty string in the message argument to the imap_mail function.

The bug was discovered 12/07/2018. The weakness was released 12/07/2018 (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2018-19935 since 12/07/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 111217 (PHP 7.3.0 [alpha|beta] < 7.3.0 Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176543 (Debian Security Update for php7.0 (DSA 4353-1)).

Upgrading to version 7.3.0 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111217) and SecurityFocus (BID 106143†). Entries connected to this vulnerability are available at VDB-124095 and VDB-127096. 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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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 111217
Nessus Name: PHP 7.3.0 [alpha|beta] < 7.3.0 Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PHP 7.3.0

Timelineinfo

07/19/2018 🔍
07/20/2018 +1 days 🔍
12/07/2018 +140 days 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
12/07/2018 +0 days 🔍
06/13/2023 +1649 days 🔍

Sourcesinfo

Product: php.org

Advisory: 77020⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-19935 (🔍)
GCVE (CVE): GCVE-0-2018-19935
GCVE (VulDB): GCVE-100-127696

OVAL: 🔍

SecurityFocus: 106143 - PHP CVE-2018-19935 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/07/2018 16:10
Updated: 06/13/2023 14:45
Changes: 12/07/2018 16:10 (60), 04/19/2020 06:29 (11), 06/13/2023 14:45 (14)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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