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openSUSE:Leap:15.2:Rings:1-MinimalX
openvpn
openvpn-2.3.x-fixed-multiple-low-severity-issue...
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File openvpn-2.3.x-fixed-multiple-low-severity-issues.patch of Package openvpn
diff --git a/src/openvpn/crypto.c b/src/openvpn/crypto.c index ff0f9a7..fb27b36 100644 --- a/src/openvpn/crypto.c +++ b/src/openvpn/crypto.c @@ -118,7 +118,7 @@ openvpn_encrypt_aead(struct buffer *buf, struct buffer work, dmsg(D_PACKET_CONTENT, "ENCRYPT FROM: %s", format_hex(BPTR(buf), BLEN(buf), 80, &gc)); /* Buffer overflow check */ - if (!buf_safe(&work, buf->len + cipher_ctx_block_size(ctx->cipher))) + if (!buf_safe(&work, buf->len + OPENVPN_MAX_BLOCK_LENGTH)) { msg(D_CRYPT_ERRORS, "ENCRYPT: buffer size error, bc=%d bo=%d bl=%d wc=%d wo=%d wl=%d", @@ -237,7 +237,7 @@ openvpn_encrypt_v1(struct buffer *buf, struct buffer work, ASSERT(cipher_ctx_reset(ctx->cipher, iv_buf)); /* Buffer overflow check */ - if (!buf_safe(&work, buf->len + cipher_ctx_block_size(ctx->cipher))) + if (!buf_safe(&work, buf->len + OPENVPN_MAX_BLOCK_LENGTH)) { msg(D_CRYPT_ERRORS, "ENCRYPT: buffer size error, bc=%d bo=%d bl=%d wc=%d wo=%d wl=%d cbs=%d", buf->capacity, @@ -378,7 +378,7 @@ openvpn_decrypt_aead(struct buffer *buf, struct buffer work, const cipher_kt_t *cipher_kt = cipher_ctx_get_cipher_kt(ctx->cipher); uint8_t *tag_ptr = NULL; int tag_size = 0; - int outlen; + int outlen = 0; struct gc_arena gc; gc_init(&gc); @@ -455,7 +455,7 @@ openvpn_decrypt_aead(struct buffer *buf, struct buffer work, dmsg(D_PACKET_CONTENT, "DECRYPT FROM: %s", format_hex(BPTR(buf), BLEN(buf), 0, &gc)); /* Buffer overflow check (should never fail) */ - if (!buf_safe(&work, buf->len + cipher_ctx_block_size(ctx->cipher))) + if (!buf_safe(&work, buf->len + OPENVPN_MAX_BLOCK_LENGTH)) { CRYPT_ERROR("potential buffer overflow"); } @@ -601,7 +601,7 @@ openvpn_decrypt_v1(struct buffer *buf, struct buffer work, } /* Buffer overflow check (should never happen) */ - if (!buf_safe(&work, buf->len + cipher_ctx_block_size(ctx->cipher))) + if (!buf_safe(&work, buf->len + OPENVPN_MAX_BLOCK_LENGTH)) { CRYPT_ERROR("potential buffer overflow"); } diff --git a/src/openvpn/crypto_openssl.h b/src/openvpn/crypto_openssl.h index 60a2812..c191695 100644 --- a/src/openvpn/crypto_openssl.h +++ b/src/openvpn/crypto_openssl.h @@ -52,6 +52,9 @@ typedef HMAC_CTX hmac_ctx_t; /** Maximum length of an IV */ #define OPENVPN_MAX_IV_LENGTH EVP_MAX_IV_LENGTH +/** Maximum length of a cipher block */ +#define OPENVPN_MAX_BLOCK_LENGTH EVP_MAX_BLOCK_LENGTH + /** Cipher is in CBC mode */ #define OPENVPN_MODE_CBC EVP_CIPH_CBC_MODE diff --git a/src/openvpn/init.c b/src/openvpn/init.c index 0652ef4..9fa3352 100644 --- a/src/openvpn/init.c +++ b/src/openvpn/init.c @@ -3067,8 +3067,8 @@ init_context_buffers(const struct frame *frame) b->aux_buf = alloc_buf(BUF_SIZE(frame)); #ifdef ENABLE_CRYPTO - b->encrypt_buf = alloc_buf(BUF_SIZE(frame)); - b->decrypt_buf = alloc_buf(BUF_SIZE(frame)); + b->encrypt_buf = alloc_buf(BUF_SIZE(frame) + OPENVPN_MAX_BLOCK_LENGTH); + b->decrypt_buf = alloc_buf(BUF_SIZE(frame) + OPENVPN_MAX_BLOCK_LENGTH); #endif #ifdef USE_COMP diff --git a/src/openvpn/proxy.c b/src/openvpn/proxy.c index 7a737ea..592bd97 100644 --- a/src/openvpn/proxy.c +++ b/src/openvpn/proxy.c @@ -73,6 +73,9 @@ recv_line(socket_descriptor_t sd, struct buffer la; int lastc = 0; + if (sd >= FD_SETSIZE) + return false; + CLEAR(la); if (lookahead) { @@ -311,11 +314,11 @@ get_proxy_authenticate(socket_descriptor_t sd, struct gc_arena *gc, volatile int *signal_received) { - char buf[256]; + char buf[256] = {0}; int ret = HTTP_AUTH_NONE; while (true) { - if (!recv_line(sd, buf, sizeof(buf), timeout, true, NULL, signal_received)) + if (!recv_line(sd, buf, sizeof(buf) - 1, timeout, true, NULL, signal_received)) { free(*data); *data = NULL; @@ -631,9 +634,9 @@ establish_http_proxy_passthru(struct http_proxy_info *p, volatile int *signal_received) { struct gc_arena gc = gc_new(); - char buf[512]; - char buf2[129]; - char get[80]; + char buf[512] = {0}; + char buf2[129] = {0}; + char get[80] = {0}; int status; int nparms; bool ret = false; @@ -723,7 +726,8 @@ establish_http_proxy_passthru(struct http_proxy_info *p, } /* receive reply from proxy */ - if (!recv_line(sd, buf, sizeof(buf), get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) + memset(buf, 0, sizeof(buf)); + if (!recv_line(sd, buf, sizeof(buf) - 1, get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) { goto error; } @@ -754,7 +758,8 @@ establish_http_proxy_passthru(struct http_proxy_info *p, while (true) { - if (!recv_line(sd, buf, sizeof(buf), get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) + memset(buf, 0, sizeof(buf)); + if (!recv_line(sd, buf, sizeof(buf) - 1, get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) { goto error; } @@ -834,7 +839,8 @@ establish_http_proxy_passthru(struct http_proxy_info *p, } /* receive reply from proxy */ - if (!recv_line(sd, buf, sizeof(buf), get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) + memset(buf, 0, sizeof(buf)); + if (!recv_line(sd, buf, sizeof(buf) - 1, get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) { goto error; } @@ -959,7 +965,8 @@ establish_http_proxy_passthru(struct http_proxy_info *p, } /* receive reply from proxy */ - if (!recv_line(sd, buf, sizeof(buf), get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) + memset(buf, 0, sizeof(buf)); + if (!recv_line(sd, buf, sizeof(buf) - 1, get_server_poll_remaining_time(server_poll_timeout), true, NULL, signal_received)) { goto error; } diff --git a/src/openvpn/socket.c b/src/openvpn/socket.c index 4e7e3f9..93ea889 100644 --- a/src/openvpn/socket.c +++ b/src/openvpn/socket.c @@ -1162,6 +1162,9 @@ socket_listen_accept(socket_descriptor_t sd, /* struct openvpn_sockaddr *remote = &act->dest; */ struct openvpn_sockaddr remote_verify = act->dest; socket_descriptor_t new_sd = SOCKET_UNDEFINED; + + if (sd >= FD_SETSIZE) + return -1; CLEAR(*act); socket_do_listen(sd, local, do_listen, true); @@ -1314,6 +1317,9 @@ openvpn_connect(socket_descriptor_t sd, { int status = 0; + if (sd >= FD_SETSIZE) + return -1; + #ifdef TARGET_ANDROID protect_fd_nonlocal(sd, remote); #endif diff --git a/src/openvpn/socks.c b/src/openvpn/socks.c index 92747ec..f8e02a4 100644 --- a/src/openvpn/socks.c +++ b/src/openvpn/socks.c @@ -98,13 +98,16 @@ socks_username_password_auth(struct socks_proxy_info *p, socket_descriptor_t sd, volatile int *signal_received) { - char to_send[516]; - char buf[2]; + char to_send[516] = {0}; + char buf[2] = {0}; int len = 0; const int timeout_sec = 5; struct user_pass creds; ssize_t size; + if (sd >= FD_SETSIZE) + return false; + creds.defined = 0; if (!get_user_pass(&creds, p->authfile, UP_TYPE_SOCKS, GET_USER_PASS_MANAGEMENT)) { @@ -193,7 +196,7 @@ socks_handshake(struct socks_proxy_info *p, socket_descriptor_t sd, volatile int *signal_received) { - char buf[2]; + char buf[2] = {0}; int len = 0; const int timeout_sec = 5; ssize_t size; @@ -205,6 +208,9 @@ socks_handshake(struct socks_proxy_info *p, method_sel[2] = 0x02; /* METHODS = [2 (plain login)] */ } + if (sd >= FD_SETSIZE) + return false; + size = send(sd, method_sel, sizeof(method_sel), MSG_NOSIGNAL); if (size != sizeof(method_sel)) { @@ -312,9 +318,12 @@ recv_socks_reply(socket_descriptor_t sd, char atyp = '\0'; int alen = 0; int len = 0; - char buf[22]; + char buf[22] = {0}; const int timeout_sec = 5; + if (sd >= FD_SETSIZE) + return false; + if (addr != NULL) { addr->addr.in4.sin_family = AF_INET; @@ -395,7 +404,7 @@ recv_socks_reply(socket_descriptor_t sd, } /* store char in buffer */ - if (len < (int)sizeof(buf)) + if (len < (int)sizeof(buf) && len >= 0) { buf[len] = c; } @@ -447,7 +456,7 @@ establish_socks_proxy_passthru(struct socks_proxy_info *p, const char *servname, /* openvpn server port */ volatile int *signal_received) { - char buf[128]; + char buf[128] = {0}; size_t len; if (!socks_handshake(p, sd, signal_received))
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