CyberSecBulletin
CVE-2024-52924NVD status: Analyzed

Exynos 9820 Firmware: Stack-based Buffer Overflow

Published Updated By the CyberSecBulletin desk

CVE-2024-52924 is a high-severity stack-based buffer overflow vulnerability in Exynos 9820 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 0.41% 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 9820 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 9820 FirmwareNot specified in the recordNot stated
SamsungExynos 9825 FirmwareNot specified in the recordNot stated
SamsungExynos 980 FirmwareNot specified in the recordNot stated
SamsungExynos 990 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 1280 FirmwareNot specified in the recordNot stated
SamsungExynos 2200 FirmwareNot specified in the recordNot stated
SamsungExynos 1330 FirmwareNot specified in the recordNot stated
SamsungExynos 1380 FirmwareNot specified in the recordNot stated
SamsungExynos 1480 FirmwareNot specified in the recordNot stated
SamsungExynos 2400 FirmwareNot specified in the recordNot stated
SamsungExynos 9110 FirmwareNot specified in the recordNot stated
SamsungExynos W920 FirmwareNot specified in the recordNot stated
SamsungExynos W930 FirmwareNot specified in the recordNot stated
SamsungExynos W1000 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 Modem 5400 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 CISA (ADP).

Official description

An issue was discovered in NRMM in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 9820, 9825, 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 9110, W920, W930, W1000, Modem 5123, Modem 5300, and Modem 5400. Lack of boundary check during the decoding of Registration Accept messages can lead to out-of-bounds writes on the stack

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

The underlying weakness: Stack-based Buffer Overflow

The product writes past the end of a buffer that was allocated on the stack.

How developers prevent this class of flaw

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.
  • Use an abstraction library to abstract away risky APIs. Not a complete solution.
  • Implement and perform bounds checking on input.

More Stack-based Buffer Overflow vulnerabilities (CWE-121)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Exynos 9820 Firmware

All Exynos 9820 Firmware vulnerabilities

Recent Stack-based Buffer Overflow vulnerabilities

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