Wireshark (64-bit) 歷史版本列表
更新時間：2017-07-22
更新細節：
What's new in this version:
New and Updated Features:
- Experimental 32-bit and 64-bit Windows Installer (.msi) packages are available. It is recommended that you use these independently of the NSIS (.exe) installers. That is, you should make sure the NSIS package is completely uninstalled before installing the Windows Installer package and vice-versa
- Source packages are now compressed using xz instead of bzip2
- The legacy (GTK+) UI is disabled by default in the Windows installers
- The legacy (GTK+) UI is disabled by default in the development environment (Autotools and CMake)
- SS7 Point Codes can now be resolved into names with a hosts-like file
- Wireshark can now go fullscreen to have more room for packets
- TShark can now export objects like the other GUI interfaces
- Support for G.722 and G.726 codecs in the RTP Player (via the SpanDSP library)
- You can now choose the output device when playing RTP streams
- Added support for dissectors to include a unit name natively in their hf field. A field can now automatically append "seconds" or "ms" to its value without additional printf-style APIs
- The Default profile can now be reset to default values
- You can move back and forth in the selection history in the Qt UI
- IEEE 802.15.4 dissector now uses an UAT for decryption keys. The original decryption key preference has been obsoleted
- Extcap utilities can now provide configuration for a GUI interface toolbar to control the extcap utility while capturing
- Extcap utilities can now validate the capture filter
- Display filter function len() can now be used on all string and byte fields
- Added an experimental timeline view for 802.11 wireless packet data which can be enabled via the "802.11 radio information" preferences
- Added TLS 1.3 (draft 21) dissection and decryption support (Bug 12779)
- The (D)TLS Application Layer protocol (e.g. HTTP or CoAP) can now be changed via the Decode As dialog
- The RSA keys dialog for SSL keys has improved feedback for invalid settings and no longer requires the IP address, Port or Protocol fields to be set in addition to the Key File
- TCP Analysis will detect and flag more spurious retransmissions
New Protocol Support:
- Bluetooth HCI Vendor Intel, CAN FD, Citrix NetScaler Metric Exchange Protocol, Citrix NetScaler RPC Protocol, DirectPlay 8 protocol, Ericsson A-bis P-GSL, Ericsson A-bis TFP (Traffic Forwarding Protocol), Facebook Zero, Fc00/cjdns Protocol, Generic Netlink (genl), GSM Osmux, GSMTAP based logging, Health Level 7 (HL7), High-speed SECS message service (HSMS), HomePNA, IndigoCare iCall protocol, IndigoCare Netrix protocol, iPerf2, ISO 15765, Linux 802.11 Netlink (nl80211), Local Service Discovery (LSD), M2 Application Protocol, Mesh Link Establishment (MLE), MUDURL, Netgear Ensemble Protocol, NetScaler HA Protocol, NetScaler Metric Exchange Protocol, NetScaler RPC Protocol, NM protocol, Nordic BLE Sniffer, NVMe, NVMe Fabrics RDMA, OBD-II PIDs, OpenThread simulator, RFTap Protocol, SCTE-35 Digital Program Insertion Messages, Snort Post-dissector, Thread CoAP, UDP based FTP w/ multicast (UFTP and UFTP4), Unified Diagnostic Services (UDS), vSocket, Windows Cluster Management API (clusapi), and X-Rite i1 Display Pro (and derivatives) USB protocol
New and Updated Capture File Support:
- ERF, IxVeriWave, Libpcap, and Pcap-ng
Major API Changes:
- IEEE802.11: wlan_mgt display filter element got renamed to wlan
- Libgcrypt is now a required dependency
File Locations:
- Wireshark and TShark look in several different locations for preference files, plugins, SNMP MIBS, and RADIUS dictionaries. These locations vary from platform to platform. You can use About→Folders to find the default locations on your system
更新時間：2017-07-19
更新細節：
What's new in this version:
BUG FIXES:
The following vulnerabilities have been fixed:
- [1]wnpa-sec-2017-13: WBMXL dissector infinite loop ([2]Bug 13477, [3]Bug 13796), [4]CVE-2017-7702, [5]CVE-2017-11410
- [6]wnpa-sec-2017-28: openSAFETY dissector memory exhaustion ([7]Bug 13649,[8]Bug 13755), [9]CVE-2017-9350, [10]CVE-2017-11411
- [11]wnpa-sec-2017-34: AMQP dissector crash. ([12]Bug 13780) [13]CVE-2017-11408
- [14]wnpa-sec-2017-35: MQ dissector crash. ([15]Bug 13792) [16]CVE-2017-11407
- [17]wnpa-sec-2017-36: DOCSIS infinite loop. ([18]Bug 13797) [19]CVE-2017-11406
The following bugs have been fixed:
- Y.1711 dissector reverses defect type order. ([20]Bug 8292)
- Packet list keeps scrolling back to selected packet while names are being resolved. ([21]Bug 12074)
- [REGRESSION] Export Objects do not show files from a SMB2 capture. ([22]Bug 13214)
- LTE RRC: lte-rrc.q_RxLevMin filter fails on negative values. ([23]Bug 13481)
- Hexpane showing in proportional font again. ([24]Bug 13638)
- Regression in SCCP fragments handling. ([25]Bug 13651)
- TCAP SRT incorrectly matches TC_BEGINs and TC_ENDs. ([26]Bug 13739)
- Dissector for WSMP (IEEE 1609.3) not current. ([27]Bug 13766)
- RANAP: possible issue in the heuristic code. ([28]Bug 13770)
- [oss-fuzz] UBSAN: shift exponent 35 is too large for 32-bit type int in packet-btrfcomm.c:314:37. ([29]Bug 13783)
- RANAP: false positives on heuristic algorithm. ([30]Bug 13791)
- Automatic name resolution not saved to PCAP-NG NRB. ([31]Bug 13798)
- DAAP dissector dissect_daap_one_tag recursion stack exhausted. ([32]Bug 13799)
- Malformed DCERPC PNIO packet decode, exception handler invalid poionter reference. ([33]Bug 13811)
- It seems SPVID was decoded from wrong field. ([34]Bug 13821)
- README.dissectors: Add notes about predefined string structures not available to plugin authors. ([35]Bug 13828)
- Statistics->Packet Lengths doesn't display details for 5120 or greater. ([36]Bug 13844)
- cmake/modules/FindZLIB.cmake doesn't find inflatePrime. ([37]Bug 13850)
- BGP: incorrect decoding COMMUNITIES whose length is larger than 255. ([38]Bug 13872)
UPDATED PROTOCOL SUPPORT:
AMQP, BGP, BSSMAP, BT RFCOMM, DAAP, DOCSIS, E.212, FDDI, GSM A GM, GSM BSSMAP, IEEE 802.11, IP, ISIS LSP, LTE RRC, MQ, OpenSafety, OSPF, PROFINET IO, RANAP, SCCP, SGSAP, SMB2, TCAP, TCP, UMTS FP, UMTS RLC, WBXML, WSMP, and Y.1711
更新時間：2017-06-02
更新細節：
What's new in this version:
The following vulnerabilities have been fixed:
- wnpa-sec-2017-22
- Bazaar dissector infinite loop (Bug 13599) CVE-2017-9352
- wnpa-sec-2017-23
- DOF dissector read overflow (Bug 13608) CVE-2017-9348
- wnpa-sec-2017-24
- DHCP dissector read overflow (Bug 13609, Bug 13628) CVE-2017-9351
- wnpa-sec-2017-25
- SoulSeek dissector infinite loop (Bug 13631) CVE-2017-9346
- wnpa-sec-2017-26
- DNS dissector infinite loop (Bug 13633) CVE-2017-9345
- wnpa-sec-2017-27
- DICOM dissector infinite loop (Bug 13685) CVE-2017-9349
- wnpa-sec-2017-28
- openSAFETY dissector memory exhaustion (Bug 13649) CVE-2017-9350
- wnpa-sec-2017-29
- BT L2CAP dissector divide by zero (Bug 13701) CVE-2017-9344
- wnpa-sec-2017-30
- MSNIP dissector crash (Bug 13725) CVE-2017-9343
- wnpa-sec-2017-31
- ROS dissector crash (Bug 13637) CVE-2017-9347
- wnpa-sec-2017-32
- RGMP dissector crash (Bug 13646) CVE-2017-9354
- wnpa-sec-2017-33
- IPv6 dissector crash (Bug 13675) CVE-2017-9353
The following bugs have been fixed:
- DICOM dissection error. (Bug 13164)
- Qt: drag & drop of one column header in PacketList moves other columns. (Bug 13183)
- Can not export captured DICOM objects in version 2.2.5. (Bug 13570)
- False complain about bad checksum of ICMP extension header. (Bug 13586)
- LibFuzzer: ISUP dissector bug (isup.number_different_meaning). (Bug 13588)
- Dissector Bug, protocol BT ATT. (Bug 13590)
- Wireshark dispalys RRCConnectionReestablishmentRejectRRCConnectionReestablishmentReject in Info column. (Bug 13595)
- [oss-fuzz] UBSAN: shift exponent 105 is too large for 32-bit type int in packet-ositp.c:551:79. (Bug 13606)
- [oss-fuzz] UBSAN: shift exponent -77 is negative in packet-netflow.c:7717:23. (Bug 13607)
- [oss-fuzz] UBSAN: shift exponent 1959 is too large for 32-bit type int in packet-sigcomp.c:2128:28. (Bug 13610)
- [oss-fuzz] UBSAN: shift exponent 63 is too large for 32-bit type guint32 (aka unsigned int) in packet-rtcp.c:917:24. (Bug 13611)
- [oss-fuzz] UBSAN: shift exponent 70 is too large for 64-bit type guint64 (aka unsigned long) in dwarf.c:42:43. (Bug 13616)
- [oss-fuzz] UBSAN: shift exponent 32 is too large for 32-bit type int in packet-xot.c:260:23. (Bug 13618)
- [oss-fuzz] UBSAN: shift exponent -5 is negative in packet-sigcomp.c:1722:36. (Bug 13619)
- [oss-fuzz] UBSAN: index 2049 out of bounds for type char [2049] in packet-quakeworld.c:134:5. (Bug 13624)
- [oss-fuzz] UBSAN: shift exponent 35 is too large for 32-bit type int in packet-netsync.c:467:25. (Bug 13639)
- [oss-fuzz] UBSAN: shift exponent 32 is too large for 32-bit type int in packet-sigcomp.c:3857:24. (Bug 13641)
- [oss-fuzz] ASAN: stack-use-after-return epan/dissectors/packet-ieee80211.c:14341:23 in add_tagged_field. (Bug 13662)
- Welcome screen invalid capture filter wihtout WinPcap installed causes runtime error. (Bug 13672)
- SMB protocol parser does not parse SMB_COM_TRANSACTION2_SECONDARY (0x33) command correctly. (Bug 13690)
- SIP packets with SDP marked as malformed. (Bug 13698)
- [oss-fuzz] UBSAN: index 8 out of bounds for type gboolean const[8] in packet-ieee80211-radiotap.c:1836:12. (Bug 13713)
- Crash on "Show packet bytes…" context menu item click. (Bug 13723)
- DNP3 dissector does not properly decode packed variations with prefixed qualifiers. (Bug 13733)
Updated Protocol Support:
- Bazaar, BT ATT, BT L2CAP, DHCP, DICOM, DNP3, DNS, DOF, DWARF, ICMP, IEEE 802.11, IPv6, ISUP, LTE RRC, MSNIP, Netflow, Netsync, openSAFETY, OSITP, QUAKEWORLD, Radiotap, RGMP, ROS, RTCP, SIGCOMP, SMB, SoulSeek, and XOT
更新時間：2017-04-13
更新細節：
What's new in this version:
The following vulnerabilities have been fixed:
- IMAP dissector crash
- WBMXL dissector infinite loop
- NetScaler file parser infinite loop
- RPCoRDMA dissector infinite loop
- BGP dissector infinite loop
- DOF dissector infinite loop
- PacketBB dissector crash
- SLSK dissector long loop
- SIGCOMP dissector infinite loop
- WSP dissector infinite loop
The following bugs have been fixed:
- T30 FCF byte decoding masks DTC, CIG and NCS
- Wireshark gives decoding error during rnsap message dissection(SCCP reassembly)
- Added IEEE 802.15.4-2003 AES-CCM security modes (packet-ieee802154)
- Payload in 2 SCCP DT1 messages in the same frame isn’t (sub)dissected
- IEEE 802.15.4: an area of Payload IEs is dissected twice
- Qt UI: Wireshark crash when deleting IO graph string while it’s in editing mode
- Crash on exit due to an invalid frame data sequence state
- Access Violation using Lua dissector
- Some bytes ignored in every packet in NetScaler packet trace when vmnames are included in packet headers
- VOIP RTP stream Find Reverse button doesn’t work
- Lua dissector: ProtoField int&42; do not allow FT_HEX or FT_OCT, crash when set to FT_HEX_DEC or FT_DEC_HEX
- GIOP LocateRequest v1.0 is improperly indicated as "malformed"
- Bug in ZigBee - Zone Status Change Notification
- Packet exception in packet-ua3g and incomplete strings in packet-noe
- Wrong BGP capability dissect
- Endpoint statistics column labels seem incorrect
- Strange automatic jump in packet details for a certain DNS response packet
- When a Lua enum or bool preference is changed via context menu, prefs_changed isn’t called with Qt Wireshark
- IO Graph selects wrong packet or displays "Packet number x isn’t displayed"
- tshark’s -z endpoints,ip ignores optional filter
- SSL: Handshake type in Info column not always separated by comma
- libfuzzer: PEEKREMOTE dissector bug
- libfuzzer: packetBB dissector bug (packetbb.msg.addr.valuecustom)
- libfuzzer: WSP dissector bug (wsp.header.x_wap_tod)
- libfuzzer: MIH dissector bug
- libfuzzer: DNS dissector bug
- libfuzzer: WLCCP dissector bug
- libfuzzer: TAPA dissector bug
- libfuzzer: lapsat dissector bug
- libfuzzer: wassp dissector bug
- Illegal reassembly of GSM SMS packets
- SSH Dissector uses incorrect length for protocol field (ssh.protocol)
- NBAP malformed packet for short Binding ID
- libfuzzer: WSP dissector bug (wsp.header.x_up_1.x_up_proxy_tod)
- libfuzzer: asterix dissector bug (asterix.021_230_RA)
- RTPproxy dissector adds multi lines to info column
更新時間：2017-03-05
更新細節：
What's new in this version:
BUG FIXES:
The following vulnerabilities have been fixed:
- [1]wnpa-sec-2017-03 LDSS dissector crash
- [3]wnpa-sec-2017-04 RTMTP dissector infinite loop
- [5]wnpa-sec-2017-05 WSP dissector infinite loop
- [7]wnpa-sec-2017-06 STANAG 4607 file parser infinite loop
- [9]wnpa-sec-2017-07 NetScaler file parser infinite loop
- [11]wnpa-sec-2017-08 NetScaler file parser crash
- [13]wnpa-sec-2017-09 K12 file parser crash
- [15]wnpa-sec-2017-10 IAX2 dissector infinite loop
- [17]wnpa-sec-2017-11 NetScaler file parser infinite loop
The following bugs have been fixed:
- Display filter textbox loses focus during live capturing
- Wireshark crashes when saving pcaps, opening pcaps, and exporting specified packets
- tshark stalls on FreeBSD if androiddump is present
- UTF-8 characters in packet list column title
- Recent capture file list should appear immediately on startup
- editcap segfault if a packet length is shorter than ignore bytes parameter
- dftest segfault with automated build of 2.2.5
- UMTS MAC Dissector shows Packet size limited for BCCH payload
- VS2010 win32 ±¥
- EAP AKA not being decoded properly
- Dumpcap crashes during rpcap setup
- Crash on closing SNMP capture file if snmp credentials are present
- GPRS-NS message PDU type displayed in octal instead of hexadecimal
UPDATED PROTOCOL SUPPORT:
- GPRS-NS, GTPv2, IAX2, IEEE 802.11, LDSS, MS-WSP, OpcUa, ROHC, RTMTP, SNMP, STANAG 4607, T.38, and UMTS FP
更新時間：2017-01-24
更新細節：
What's new in this version:
The following vulnerabilities have been fixed:
- The ASTERIX dissector could go into an infinite loop
- The DHCPv6 dissector could go into a large loop
The following bugs have been fixed:
- TCP reassembly: tcp.reassembled_in is not set in first packet
- Duplicated Interfaces instances while refreshing
- Time zone name needs to be converted to UTF-8 on Windows
- Crash on fast local interface changes
- Please align columns in tshark’s output
- Display data rate fields for VHT rates invalid with BCC modulation
- plugin_if_get_ws_info causes Access Violation if called during rescan
- SMTP BDAT dissector not reverting to command-code after DATA
- Wireshark fails to recognize V6 DBS Etherwatch capture files
- Runtime Error when try to merge .pcap files (Wireshark crashes)
- PPP BCP BPDU size reports not header size, but all data underneath and its header size in UI
- In-line UDP checksum bytes in 6LoWPAN IPHC are swapped
- Uninitialized memcmp on data in daintree-sna.c
- Crash when dissect WDBRPC Version 2 protocol with Dissect unknown program numbers enabled
- Contents/Resources/bin directory isn’t in the app bundle after installation
- Regression: IEEE17221 (AVDECC) decoded as IEEE1722 (AVB Transportation Protocol)
- Can’t decode packets captured with OpenBSD enc(4) encapsulating
- UDLD flags are at other end of octet
- MS-WSP dissector no longer works since commit 8c2fa5b5cf789e6d0d19cd0dd34479d0203d177a
- TBCD string decoded wrongly in MAP ATI message
- Filter Documentation: The tilde (~) operator is not documented
- VoIP Flow Sequence Causes Application Crash
Updated Protocol Support:
- 6LoWPAN, DVB-CI, ENC, GSM MAP, IEEE 1722, IEEE 1722.1, ISAKMP, MS-WSP, PPP, QUIC, Radiotap, RPC, SMTP, TCP, UCD, and UDLD
更新時間：2016-12-15
更新細節：
What's new in this version:
Bug Fixes:
The following vulnerabilities have been fixed:
- Arbitrary file deletion on Windows
The following bugs have been fixed:
- Saving all exported objects (SMB/SMB2) results in out of physical memory
- Export HTTP Objects - Single file shows as multiple files in 2.0.2
- Follow Stream and graph buttons remain greyed out in conversation window
- Dicom list of tags in element of VR=AT not properly decoded
- Malformed Packet: BGP Update (withdraw) message
- Install fail on macOS Sierra (error PKInstallErrorDomain Code=112)
- GTP: "Create PDP Context response" message shows back-off timer as malformed when included in the response
- ICMP dissector fails to properly detect timestamps
- RLC misdissection
- Text2pcap on Windows produces corrupt output when writing the capture file to the standard output
- HTML escaping of quotes in error message
- TShark doesn't respect protocols.display_hidden_proto_items setting
- RPC/RDMA dissector should exit when frame is not RPC-over-RDMA
- Some RPC-over-RDMA frames are not recognized as RPC-over-RDMA
- RPC-over-RDMA frames with chunk lists are "Malformed"
- TShark fails to pass RPC-over-RDMA frames to RPC subdissector
- Adding a DOF DPS Identity Secret, session Key, or Mode Template causes Wireshark to crash
- Wireshark shows "MS Video Source Request" in a RTCP packet as "Malformed"
Updated Protocol Support:
- BGP, BOOTP/DHCP, BTLE, DICOM, DOF, Echo, GTP, ICMP, Radiotap, RLC, RPC over RDMA, RTCP, SMB, TCP, UFTP4, and VXLAN
更新時間：2016-11-17
更新細節：
What's new in this version:
Bug fixes:
- [1]wnpa-sec-2016-58: Profinet I/O long loop. ([2]Bug 12851)
- [3]wnpa-sec-2016-59: AllJoyn crash. ([4]Bug 12953)
- [5]wnpa-sec-2016-60: OpenFlow crash. ([6]Bug 13071)
- [7]wnpa-sec-2016-61: DCERPC crash. ([8]Bug 13072)
- [9]wnpa-sec-2016-62: DTN infinite loop. ([10]Bug 13097)
The following bugs have been fixed:
- TCP: nextseq incorrect if TCP_MAX_UNACKED_SEGMENTS exceeded & FIN true. ([12]Bug 12579)
- SMPP schedule_delivery_time displayed wrong in Wireshark 2.1.0. ([13]Bug 12632)
- Upgrading to latest version uninstalls Microsoft Visual C++ redistributable. ([14]Bug 12712)
- dmg for OS X does not install man pages. ([15]Bug 12746)
- Fails to compile against Heimdal 1.5.3. ([16]Bug 12831)
- TCP: Next sequence number off by one when sending payload in SYN packet (e.g. TFO). ([17]Bug 12838)
- Follow TCP Stream shows duplicate stream data. ([18]Bug 12855)
- Dissection engine falsely asserts that EIGRP packet's checksum is incorrect. ([19]Bug 12982)
- IEEE 802.15.4 frames erroneously handed over to ZigBee dissector. ([20]Bug 12984)
- Capture Filter Bookmark Inactive in Capture Options page. ([21]Bug 12986)
- CLNP dissector does not parse ER NPDU properly. ([22]Bug 12993)
- SNMP trap bindings for NON scalar OIDs. ([23]Bug 13013)
- BGP LS Link Protection Type TLV (1093) decoding. ([24]Bug 13021)
- Application crash sorting column for tcp.window_size_scalefactor up and down. ([25]Bug 13023)
- ZigBee Green Power add key during execution. ([26]Bug 13031)
- Malformed AMPQ packets for session.expected and session.confirmed fields. ([27]Bug 13037)
- Wireshark 2.2.1 crashes when attempting to merge pcap files. ([28]Bug 13060)
- [IS-637A] SMS - Teleservice layer parameter --> IA5 encoded text is not correctly displayed. ([29]Bug 13065)
- Failure to dissect USB Audio feature unit descriptors missing the iFeature field. ([30]Bug 13085)
- MSISDN not populated/decoded in JSON GTP-C decoding. ([31]Bug 13086)
- E212: 3 digits MNC are identified as 2 digits long if they end with a 0. ([32]Bug 13092)
- Exception with last unknown Cisco AVP available in a SCCRQ message. ([33]Bug 13103)
- TShark stalls on FreeBSD if androiddump is present. ([34]Bug 13104)
- Dissector skips DICOM command. ([35]Bug 13110)
- UUID (FT_GUID) filtering isn't working. ([36]Bug 13121)
- Manufacturer name resolution fail. ([37]Bug 13126)
- packet-sdp.c allocates transport_info->encoding_name from wrong memory pool. ([38]Bug 13127)
- Payload type name for dynamic payload is wrong for reverse RTP channels. ([39]Bug 13132)
UPDATED PROTOCOL SUPPORT:
- 6LoWPAN, AllJoyn, AMPQ, ANSI IS-637 A, BGP, CLNP, DCERPC, DICOM, DTN, E.212, EIGRP, ERF, GVSP, IEEE 802.11, IEEE 802.15.4, IP, ISO-8583, Kerberos, L2TP, LACP, MAC LTE, OpenFlow, Profinet I/O, RTPS, SCTP, SDP, Skype, SMPP, SNA, SNMP, SPNEGO, TCP, USB Audio, XML, and ZigBee
更新時間：2016-10-06
更新細節：
What's new in this version:
Bug Fixes:
- The Bluetooth L2CAP dissector could crash
- The NCP dissector could crash
The following bugs have been fixed:
- Flow Graph colored data arrows
- Capture File Properties under Statistics Grayed Out after Stopping a Capture
- Qt: Hidden columns displayed during live capture
- Unable to save changes to coloring rules
- Bad description for NBSS error code 0x81
- Live capture from USBPcap fails immediately
- Cannot decrypt EAP-TTLS traffic (not recognized as conversation)
- Export packet dissections Option disabled after capturing traffic
- Failure to open file named with Chinese or other multibyte characters
- k12 text file format causes errors
- File | File Set | List Files dialog is blank
- Decoding/Display of an INAP CONNECT message goes wrong for the Destination Routing Address part
- TLS padding extension dissector length parsing bug
- Diameter dictionary bugs
- File open from menu bar with filter in place causes Wireshark to crash
- Unable to capture USBPcap trace using tshark with extcap built
- P1 dissector fails a TVB assertion
- Multiple PortableApps instances can once again be run at the same time
更新時間：2016-10-06
更新細節：
What's new in this version:
New:
- Invalid coloring rules are now disabled instead of discarded. This will provide forward compatibility with a coloring rule change in Wireshark 2.2.
Bug Fixes:
- Capture File Properties under Statistics Grayed Out after Stopping a Capture
- Qt: Hidden columns displayed during live capture
- Bad description for NBSS error code 0x81
- Export packet dissections Option disabled after capturing traffic
- TLS padding extension dissector length parsing bug
- Diameter dictionary bugs
- Multiple PortableApps instances can once again be run at the same time