Issue summary: SM2 signature generation uses non-constant-time arithmetic
\non secret values, forming a timing side-channel.<\/p>\n
Impact summary: An attacker able to measure SM2 signing times may learn
\ninformation about the per-signature secret nonce, which over many signatures
\ncan, via a lattice \/ Hidden Number Problem attack, lead to recovery of the
\nprivate key.<\/p>\n
CWE: CWE-208: Observable Timing Discrepancy<\/p>\n
Description: SM2 signature generation computes the signature value using
\nvariable-time BIGNUM operations on the secret nonce and the private key, so
\nthe time taken to produce an SM2 signature depends on these secret values,
\nforming a timing side-channel.<\/p>\n
Applications performing SM2 signature generation are affected on all
\nplatforms.<\/p>\n
FIPS Impact: no
\nSM2 is not a FIPS algorithm.<\/p>\n","protected":false},"excerpt":{"rendered":"
Issue summary: SM2 signature generation uses non-constant-time arithmetic
\non secret values, forming a timing side-channel.<\/p>\n
Impact summary: An attacker able to measure SM2 signing times may learn
\ninfo<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-30631","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/30631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}