VDB-160685 · CVE-2020-24385 · GCVE-0-2020-24385

MidnightBSD/FreeBSD linux_emul.h em_find null pointer dereference

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4.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in MidnightBSD and FreeBSD. It has been rated as problematic. This affects the function em_find of the file sys/compat/linux/linux_emul.h. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2020-24385. The attack can only be performed from a local environment. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in MidnightBSD and FreeBSD (Operating System) (version unknown). It has been rated as problematic. This issue affects the function em_find of the file sys/compat/linux/linux_emul.h. 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. The summary by CVE is:

In MidnightBSD before 1.2.6 and 1.3 before August 2020, and FreeBSD before 7, a NULL pointer dereference was found in the Linux emulation layer that allows attackers to crash the running kernel. During binary interaction, td->td_emuldata in sys/compat/linux/linux_emul.h is not getting initialized and returns NULL from em_find().

The weakness was published 09/03/2020 (Website). The advisory is shared at midnightbsd.org. The identification of this vulnerability is CVE-2020-24385 since 08/19/2020. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

Upgrading eliminates this vulnerability.

Similar entry is available at VDB-160686. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Operating System

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/19/2020 🔍
09/03/2020 +15 days 🔍
09/04/2020 +1 days 🔍
11/12/2020 +69 days 🔍

Sourcesinfo

Advisory: midnightbsd.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-24385 (🔍)
GCVE (CVE): GCVE-0-2020-24385
GCVE (VulDB): GCVE-100-160685
See also: 🔍

Entryinfo

Created: 09/04/2020 07:28
Updated: 11/12/2020 16:31
Changes: 09/04/2020 07:28 (38), 09/04/2020 07:33 (18), 11/11/2020 08:13 (1), 11/12/2020 16:31 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.