CVE-2023-33221 — When reading DesFire keys, the function that reads the card isn't properly check

When reading DesFire keys, the function that reads the card isn't properly checking the boundaries when copying internally the data received. This allows a heap based buffer overflow that could lead to a potential Remote Code Execution on the targeted device. This is especia

01What is this vulnerability?

When reading DesFire keys, the function that reads the card isn't properly checking the boundaries when copying internally the data received. This allows a heap based buffer overflow that could lead to a potential Remote Code Execution on the targeted device. This is especially problematic if you use Default DESFire key.

02Affected products

Vendor	Product	Versions
IDEMIA	SIGMA Lite & Lite +	0
IDEMIA	SIGMA Wide	0
IDEMIA	SIGMA Extreme	0
IDEMIA	MorphoWave Compact/XP	0
IDEMIA	VisionPass	0
IDEMIA	MorphoWave SP	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-15T11:32:48.427Z
• Last modified: 2024-08-02T15:39:35.729Z

09References

• www.idemia.com — https://www.idemia.com/wp-content/uploads/2023/11/Security-Advisory-SA-2023-05-2…