CyberSecBulletin
CVE-2023-31034NVD status: Modified

DGX A100: Integer Overflow or Wraparound

Published Updated By the CyberSecBulletin desk

CVE-2023-31034 is a high-severity integer overflow or wraparound vulnerability in DGX A100 from NVIDIA, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected DGX A100 versions: All SBOIS versions prior to 1.25. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.15% 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. Update Dgx A100 Firmware to 1.25 or a later version.
  2. Read the advisory on nvidia.custhelp.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
NVIDIADGX A100All SBOIS versions prior to 1.25Not stated
NVIDIADgx A100 Firmwarebefore 1.251.25

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

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

Scoring systemScoreSeverityScored by
CVSS 3.16.6MediumCNA (nvidia.com)
CVSS 3.17.8HighNVD

Official description

NVIDIA DGX A100 SBIOS contains a vulnerability where a local attacker can cause input validation checks to be bypassed by causing an integer overflow. A successful exploit of this vulnerability may lead to denial of service, information disclosure, and data tampering.

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

The underlying weakness: Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

How developers prevent this class of flaw

  • Ensure that all protocols are strictly defined, such that all out-of-bounds behavior can be identified simply, and require strict conformance to the protocol.
  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. If possible, choose a language or compiler that performs automatic bounds checking.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Use libraries or frameworks that make it easier to handle numbers without unexpected consequences. Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++).

More Integer Overflow or Wraparound vulnerabilities (CWE-190)

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 DGX A100

All DGX A100 vulnerabilities

Recent Integer Overflow or Wraparound vulnerabilities

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