Hello, The openssl command line tool treats the non-null terminated buffer "mbuf" as a C string when using the pop3 s_client feature. This causes a segmentation fault with malloc.conf option "J" set when BIO_printf() runs off the end of the buffer. The following patch fixes PR 6282.
Matthew Index: s_client.c =================================================================== RCS file: /cvs/src/lib/libssl/src/apps/s_client.c,v retrieving revision 1.19 diff -u s_client.c --- s_client.c 30 Jan 2009 03:56:05 -0000 1.19 +++ s_client.c 6 Apr 2010 13:26:17 -0000 @@ -1074,7 +1074,7 @@ if (starttls_proto) { - BIO_printf(bio_err,"%s",mbuf); + BIO_write(bio_err, mbuf, mbuf_len); /* We don't need to know any more */ starttls_proto = PROTO_OFF; }