CyberSecBulletin
CVE-2023-37368NVD status: Modified

Exynos 9810 Firmware: NULL Pointer Dereference

Published Updated By the CyberSecBulletin desk

CVE-2023-37368 is a high-severity NULL pointer dereference vulnerability in Exynos 9810 Firmware from Samsung, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.55% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of Exynos 9810 Firmware you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on semiconductor.samsung.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
SamsungExynos 9810 FirmwareNot specified in the recordNot stated
SamsungExynos 9610 FirmwareNot specified in the recordNot stated
SamsungExynos 9820 FirmwareNot specified in the recordNot stated
SamsungExynos 980 FirmwareNot specified in the recordNot stated
SamsungExynos 850 FirmwareNot specified in the recordNot stated
SamsungExynos 1080 FirmwareNot specified in the recordNot stated
SamsungExynos 2100 FirmwareNot specified in the recordNot stated
SamsungExynos 2200 FirmwareNot specified in the recordNot stated
SamsungExynos 1280 FirmwareNot specified in the recordNot stated
SamsungExynos 1380 FirmwareNot specified in the recordNot stated
SamsungExynos 1330 FirmwareNot specified in the recordNot stated
SamsungExynos 9110 FirmwareNot specified in the recordNot stated
SamsungExynos W920 FirmwareNot specified in the recordNot stated
SamsungExynos Modem 5123 FirmwareNot specified in the recordNot stated
SamsungExynos Modem 5300 FirmwareNot specified in the recordNot stated
SamsungExynos Auto T5123 FirmwareNot specified in the recordNot stated

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.15.9MediumCNA (mitre.org)
CVSS 3.17.5HighNVD

Official description

An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor, and Modem (Exynos Mobile Processor, Automotive Processor, and Modem - Exynos 9810, Exynos 9610, Exynos 9820, Exynos 980, Exynos 850, Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, Exynos 1380, Exynos 1330, Exynos 9110, Exynos W920, Exynos Modem 5123, Exynos Modem 5300, and Exynos Auto T5123). In the Shannon MM Task, Missing validation of a NULL pointer can cause abnormal termination via a malformed NR MM packet.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

How developers prevent this class of flaw

  • For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
  • Select a programming language that is not susceptible to these issues.
  • Check the results of all functions that return a value and verify that the value is non-null before acting upon it.

More NULL Pointer Dereference vulnerabilities (CWE-476)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Exynos 9810 Firmware

All Exynos 9810 Firmware vulnerabilities

Recent NULL Pointer Dereference vulnerabilities

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