[openssl/openssl] 8b19d5: rsa_sig: reject short buffers in raw verify_recover
"'Dexter.k' via openssl-commits" <[email protected]>
| Newsgroups | gmane.comp.encryption.openssl.cvs |
|---|---|
| Message-ID | <openssl/openssl/push/refs/heads/openssl-4.0/[email protected]> |
Branch: refs/heads/openssl-4.0
Home: https://github.com/openssl/openssl
Commit: 8b19d5dfdd438574f74b894afe13ca8e183bdfe2
https://github.com/openssl/openssl/commit/8b19d5dfdd438574f74b894afe13ca8e183bdfe2
Author: rootvector2 <[email protected]>
Date: 2026-06-02 (Tue, 02 Jun 2026)
Changed paths:
M providers/implementations/signature/rsa_sig.c
Log Message:
-----------
rsa_sig: reject short buffers in raw verify_recover
The md==NULL path of rsa_verify_recover passed the caller buffer to
RSA_public_decrypt without checking routsize, while the X9.31 and PKCS#1
paths already reject undersized output buffers. RSA_public_decrypt writes
up to RSA_size() bytes, so a short rout overflows. Validate routsize
against RSA_size() before the call.
Fixes: 6f4b7663150e "PROV: add RSA signature implementation"
Reviewed-by: Tomas Mraz <[email protected]>
Reviewed-by: Dmitry Belyavskiy <[email protected]>
Reviewed-by: Eugene Syromiatnikov <[email protected]>
Reviewed-by: Paul Yang <[email protected]>
MergeDate: Tue Jun 2 11:55:00 2026
(Merged from https://github.com/openssl/openssl/pull/31340)
(cherry picked from commit 78dd79823215ff37a51d977b47cf0bcb4798cee2)
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