AZL-105366
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105366.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-105366
- Upstream
- Published
- 2026-09-29T16:17:11Z
- Modified
- 2026-10-04T05:31:39Z
- Summary
- CVE-2026-77696 affecting package openssl-fips-provider 3.1.2-2
- Details
-
Issue summary: SM2 signature generation uses non-constant-time arithmetic on secret values, forming a timing side-channel.
Impact summary: An attacker able to measure SM2 signing times may learn information about the per-signature secret nonce, which over many signatures can, via a lattice / Hidden Number Problem attack, lead to recovery of the private key.
CWE: CWE-208: Observable Timing Discrepancy
Description: SM2 signature generation computes the signature value using variable-time BIGNUM operations on the secret nonce and the private key, so the time taken to produce an SM2 signature depends on these secret values, forming a timing side-channel.
Applications performing SM2 signature generation are affected on all platforms.
FIPS Impact: no SM2 is not a FIPS algorithm.
- References