Package: libssl1.0.0 Version: 1.0.1e-2+deb7u4 Severity: normal Dear Maintainer,
When creating a client context with SSL_CTX_new(TLSv1_client_method()), SSL_Connect() triggers a heap overrun with the following output from valgrind: ==24315== Thread 10: ==24315== Invalid write of size 4 ==24315== at 0x4C2B4FF: memset (mc_replace_strmem.c:966) ==24315== by 0x5894BAE: MD5_Final (md5.c:293) ==24315== by 0x72A8CED: EVP_DigestFinal_ex (digest.c:272) ==24315== by 0x673797A: ssl3_get_key_exchange (s3_clnt.c:1782) ==24315== by 0x673B042: ssl3_connect (s3_clnt.c:359) ==24315== by 0x58818EE: _sock_connected (sock.c:596) ==24315== by 0x587A531: _thread (thread.c:644) ==24315== by 0x5442B4F: start_thread (pthread_create.c:304) ==24315== Address 0x7866694 is 0 bytes after a block of size 100 alloc'd ==24315== at 0x4C28BED: malloc (vg_replace_malloc.c:263) ==24315== by 0x721B77F: CRYPTO_malloc (mem.c:308) ==24315== by 0x72A8B48: EVP_DigestInit_ex (digest.c:210) ==24315== by 0x673791A: ssl3_get_key_exchange (s3_clnt.c:1777) ==24315== by 0x673B042: ssl3_connect (s3_clnt.c:359) ==24315== by 0x58818EE: _sock_connected (sock.c:596) ==24315== by 0x587A531: _thread (thread.c:644) ==24315== by 0x5442B4F: start_thread (pthread_create.c:304) ==24315== SSL_Connect() returned WANT_READ, and once there was data on the socket calling SSL_Connect() the second time triggered the bug. The bug is fixed by creating a context with SSLv23_client_method() instead. Thanks, Brandon -- System Information: Debian Release: 7.4 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages libssl1.0.0 depends on: ii debconf [debconf-2.0] 1.5.49 ii libc6 2.13-38+deb7u1 ii multiarch-support 2.13-38+deb7u1 ii zlib1g 1:1.2.7.dfsg-13 libssl1.0.0 recommends no packages. libssl1.0.0 suggests no packages. -- debconf information excluded -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
