MidnightBSD/FreeBSD linux_emul.h em_find null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

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 160686.

Productinfo

Type

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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
ATT&CK: Unknown

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 (🔍)
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: 🔍

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