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

Vulnerability from cvelistv5 – Published: 2025-09-30 13:17 – Updated: 2025-11-04 21:15
VLAI?
Title
Timing side-channel in SM2 algorithm on 64 bit ARM
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
Assigner
References
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)
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Credits
Stanislav Fort (Aisle Research) Stanislav Fort (Aisle Research) Tomas Mraz
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  • 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.
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  • 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.



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