The branch main has been updated by cy: URL: https://cgit.FreeBSD.org/src/commit/?id=5abaf0866445a61c11665fffc148ecd13a7bb9ac
commit 5abaf0866445a61c11665fffc148ecd13a7bb9ac Author: Cy Schubert <[email protected]> AuthorDate: 2023-03-10 01:03:52 +0000 Commit: Cy Schubert <[email protected]> CommitDate: 2023-03-10 01:18:49 +0000 heimdal: Fix CVE-2022-4152, signature validation error When CVE-2022-3437 was fixed by changing memcmp to be a constant time and the workaround for th e compiler was to add "!=0". However the logic implmented was inverted resulting in CVE-2022-4152. Reported by: Timothy E Zingelman <zingelman _AT_ fnal.gov> MFC after: 1 day Security: CVE-2022-4152 Security: https://www.cve.org/CVERecord?id=CVE-2022-45142 Security: https://nvd.nist.gov/vuln/detail/CVE-2022-45142 Security: https://security-tracker.debian.org/tracker/CVE-2022-45142 Security: https://bugs.gentoo.org/show_bug.cgi?id=CVE-2022-45142 Security: https://bugzilla.samba.org/show_bug.cgi?id=15296 Security: https://www.openwall.com/lists/oss-security/2023/02/08/1 --- crypto/heimdal/lib/gssapi/krb5/arcfour.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/crypto/heimdal/lib/gssapi/krb5/arcfour.c b/crypto/heimdal/lib/gssapi/krb5/arcfour.c index 3b8d452877dd..7d1143c95d83 100644 --- a/crypto/heimdal/lib/gssapi/krb5/arcfour.c +++ b/crypto/heimdal/lib/gssapi/krb5/arcfour.c @@ -307,7 +307,7 @@ _gssapi_verify_mic_arcfour(OM_uint32 * minor_status, return GSS_S_FAILURE; } - cmp = (ct_memcmp(cksum_data, p + 8, 8) == 0); + cmp = (ct_memcmp(cksum_data, p + 8, 8) != 0); if (cmp) { *minor_status = 0; return GSS_S_BAD_MIC; @@ -695,7 +695,7 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status, return GSS_S_FAILURE; } - cmp = (ct_memcmp(cksum_data, p0 + 16, 8) == 0); /* SGN_CKSUM */ + cmp = (ct_memcmp(cksum_data, p0 + 16, 8) != 0); /* SGN_CKSUM */ if (cmp) { _gsskrb5_release_buffer(minor_status, output_message_buffer); *minor_status = 0;
