diff options
| author | Matt Caswell <matt@openssl.org> | 2015-03-02 09:27:10 +0000 |
|---|---|---|
| committer | Matt Caswell <matt@openssl.org> | 2015-03-19 11:11:22 +0000 |
| commit | 77c77f0a1b9f15b869ca3342186dfbedd1119d0e (patch) | |
| tree | ed8da070064afbc8f463a066228882486ce81d18 | |
| parent | 8b84495380098592ef7bb2fa9209ccb87803bf1d (diff) | |
Multiblock corrupted pointer fix
OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
feature only applies on 64 bit x86 architecture platforms that support AES
NI instructions. A defect in the implementation of "multiblock" can cause
OpenSSL's internal write buffer to become incorrectly set to NULL when
using non-blocking IO. Typically, when the user application is using a
socket BIO for writing, this will only result in a failed connection.
However if some other BIO is used then it is likely that a segmentation
fault will be triggered, thus enabling a potential DoS attack.
CVE-2015-0290
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Andy Polyakov <appro@openssl.org>
| -rw-r--r-- | ssl/s3_pkt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ssl/s3_pkt.c b/ssl/s3_pkt.c index 4e6a41bd58..221ae039e9 100644 --- a/ssl/s3_pkt.c +++ b/ssl/s3_pkt.c @@ -785,7 +785,7 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len) i = ssl3_write_pending(s, type, &buf[tot], nw); if (i <= 0) { - if (i < 0) { + if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) { OPENSSL_free(wb->buf); wb->buf = NULL; } |