csaf_microsoft - msrc

MSRC_CVE-2025-9231

Vulnerability from csaf_microsoft - Published: 2025-09-02 00:00 - Updated: 2025-10-02 01:05

Summary

Timing side-channel in SM2 algorithm on 64 bit ARM

Notes

Additional Resources

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer

The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

JSON

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        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
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        }
      ],
      "title": "Timing side-channel in SM2 algorithm on 64 bit ARM"
    }
  ]
}

CVE-2025-9231 (GCVE-0-2025-9231)

Vulnerability from cvelistv5 – Published: 2025-09-30 13:17 – Updated: 2025-11-04 21:15

Summary

Issue summary: A timing side-channel which could potentially allow remote recovery of the private key exists in the SM2 algorithm implementation on 64 bit ARM platforms. Impact summary: A timing side-channel in SM2 signature computations on 64 bit ARM platforms could allow recovering the private key by an attacker.. While remote key recovery over a network was not attempted by the reporter, timing measurements revealed a timing signal which may allow such an attack. OpenSSL does not directly support certificates with SM2 keys in TLS, and so this CVE is not relevant in most TLS contexts. However, given that it is possible to add support for such certificates via a custom provider, coupled with the fact that in such a custom provider context the private key may be recoverable via remote timing measurements, we consider this to be a Moderate severity issue. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as SM2 is not an approved algorithm.

Severity ?

No CVSS data available.

CWE

CWE-385 - Covert Timing Channel

Assigner

openssl

References

URL

Tags

	https://openssl-library.org/news/secadv/20250930.txt	vendor-advisory
	https://github.com/openssl/openssl/commit/fc47a2e…	patch
	https://github.com/openssl/openssl/commit/eed5adc…	patch
	https://github.com/openssl/openssl/commit/567f643…	patch
	https://github.com/openssl/openssl/commit/cba616c…	patch

Impacted products

	Vendor	Product	Version
	OpenSSL	OpenSSL	Affected: 3.5.0 , < 3.5.4 (semver) Affected: 3.4.0 , < 3.4.3 (semver) Affected: 3.3.0 , < 3.3.5 (semver) Affected: 3.2.0 , < 3.2.6 (semver)

Credits

Stanislav Fort (Aisle Research) Stanislav Fort (Aisle Research) Tomas Mraz

Show details on NVD website

JSON

To clipboard

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              "confidentialityImpact": "LOW",
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              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

MSRC_CVE-2025-9231

CVE-2025-9231 (GCVE-0-2025-9231)

Tags

Sightings

Nomenclature