Linux Kernel up to 5.3.12 fs/ext4/namei.c ext4_empty_dir null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.3.12. It has been declared as problematic. This impacts the function ext4_empty_dir of the file fs/ext4/namei.c. Such manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2019-19037. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.3.12 (Operating System) and classified as problematic. Affected by this issue is the function ext4_empty_dir of the file fs/ext4/namei.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

ext4_empty_dir in fs/ext4/namei.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference because ext4_read_dirblock(inode,0,DIRENT_HTREE) can be zero.

The weakness was disclosed 11/21/2019. This vulnerability is handled as CVE-2019-19037 since 11/17/2019. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 222864 (Linux Distros Unpatched Vulnerability : CVE-2019-19037), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (222864). The entries VDB-146013 and VDB-146011 are pretty similar. Once again VulDB remains the best 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: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 222864
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2019-19037

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/17/2019 🔍
11/21/2019 +4 days 🔍
11/21/2019 +0 days 🔍
03/05/2025 +1931 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: DLA 2114-1
Status: Not defined

CVE: CVE-2019-19037 (🔍)
GCVE (CVE): GCVE-0-2019-19037
GCVE (VulDB): GCVE-100-146012
See also: 🔍

Entryinfo

Created: 11/21/2019 08:22
Updated: 03/05/2025 07:51
Changes: 11/21/2019 08:22 (38), 11/21/2019 08:27 (18), 02/26/2024 07:37 (4), 03/05/2025 07:51 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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