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WildFly Elytron's password hashing and verification subsystem silently normalizes Unicode input via NFKC before hashing, collapsing fullwidth characters (e.g., U+FF21 'Ａ') to their ASCII equivalents (e.g., 'A'). This allows an unauthenticated remote attacker to authenticate against accounts whose owners believed their passwords contained unique non-ASCII characters by submitting a standard ASCII-only dictionary - the normalization makes the stored hash indistinguishable from its ASCII equivalent. Affected deployments span Red Hat JBoss EAP 7 and 8, Red Hat Build of Keycloak, Red Hat Data Grid 8, and several other Red Hat middleware products that share the Elytron security layer. No public exploit code or CISA KEV listing has been identified at time of analysis.
Authentication bypass in Eclipse Jetty's HTTP Digest authentication implementation allows an unauthenticated attacker who knows a target username to authenticate as any user whose password contains non-Latin-1 characters (CJK, Cyrillic, Arabic, Greek, emoji, etc.) by substituting those characters with literal '?' characters. The root defect is in DigestAuthentication.java, which uses ISO-8859-1 encoding at three points when computing H(A1), H(A2), and the final MD5 response hash - silently collapsing all code points above U+00FF to 0x3F, making collision credentials cryptographically indistinguishable from the original. A publicly available proof-of-concept demonstrates hash collision across Chinese, Korean, Cyrillic, and Greek passwords; no active exploitation has been confirmed by CISA KEV at time of analysis.
In JetBrains YouTrack before 2024.3.52635 potential spoofing attack was possible via lack of Punycode encoding. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
Denial of service could be caused to the command line interface of markdown-it-py, before v2.2.0, if an attacker was allowed to use invalid UTF-8 characters as input. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
WildFly Elytron's password hashing and verification subsystem silently normalizes Unicode input via NFKC before hashing, collapsing fullwidth characters (e.g., U+FF21 'Ａ') to their ASCII equivalents (e.g., 'A'). This allows an unauthenticated remote attacker to authenticate against accounts whose owners believed their passwords contained unique non-ASCII characters by submitting a standard ASCII-only dictionary - the normalization makes the stored hash indistinguishable from its ASCII equivalent. Affected deployments span Red Hat JBoss EAP 7 and 8, Red Hat Build of Keycloak, Red Hat Data Grid 8, and several other Red Hat middleware products that share the Elytron security layer. No public exploit code or CISA KEV listing has been identified at time of analysis.
Authentication bypass in Eclipse Jetty's HTTP Digest authentication implementation allows an unauthenticated attacker who knows a target username to authenticate as any user whose password contains non-Latin-1 characters (CJK, Cyrillic, Arabic, Greek, emoji, etc.) by substituting those characters with literal '?' characters. The root defect is in DigestAuthentication.java, which uses ISO-8859-1 encoding at three points when computing H(A1), H(A2), and the final MD5 response hash - silently collapsing all code points above U+00FF to 0x3F, making collision credentials cryptographically indistinguishable from the original. A publicly available proof-of-concept demonstrates hash collision across Chinese, Korean, Cyrillic, and Greek passwords; no active exploitation has been confirmed by CISA KEV at time of analysis.
In JetBrains YouTrack before 2024.3.52635 potential spoofing attack was possible via lack of Punycode encoding. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
Denial of service could be caused to the command line interface of markdown-it-py, before v2.2.0, if an attacker was allowed to use invalid UTF-8 characters as input. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.