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CVE-2018-7421

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop...

7.5 HighFix available

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.70%Up 0.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Record
CVE-2018-7421
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-835
Updated
2026-11-02
CVE List No score

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Record
CVE-2018-7421
Updated
2026-11-02
EUVDEUVD-2018-19152 No score

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Record
EUVD-2018-19152
Updated
2026-11-03
GitHub AdvisoriesGHSA-7mvc-3rvp-5f4m 7.5

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop...

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Record
GHSA-7mvc-3rvp-5f4m
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
OSV 7.5

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Record
CVE-2018-7421
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-7421 7.5

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Record
DEBIAN-CVE-2018-7421
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-7421 7.5

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

Record
UBUNTU-CVE-2018-7421
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVSUSE-SU-2018:0811-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Security issue fixed (bsc#1082692):

  • CVE-2018-7335: The IEEE 802.11 dissector could crash (wnpa-sec-2018-05)
  • CVE-2018-7321: thrift long dissector loop (dissect_thrift_map)
  • CVE-2018-7322: DICOM: inifinite loop (dissect_dcm_tag)
  • CVE-2018-7323: WCCP: very long loop (dissect_wccp2_alternate_mask_value_set_element)
  • CVE-2018-7324: SCCP: infinite loop (dissect_sccp_optional_parameters)
  • CVE-2018-7325: RPKI-Router Protocol: infinite loop (dissect_rpkirtr_pdu)
  • CVE-2018-7326: LLTD: infinite loop (dissect_lltd_tlv)
  • CVE-2018-7327: openflow_v6: infinite loop (dissect_openflow_bundle_control_v6)
  • CVE-2018-7328: USB-DARWIN: long loop (dissect_darwin_usb_iso_transfer)
  • CVE-2018-7329: S7COMM: infinite loop (s7comm_decode_ud_cpu_alarm_main)
  • CVE-2018-7330: thread_meshcop: infinite loop (get_chancount)
  • CVE-2018-7331: GTP: infinite loop (dissect_gprscdr_GGSNPDPRecord, dissect_ber_set)
  • CVE-2018-7332: RELOAD: infinite loop (dissect_statans)
  • CVE-2018-7333: RPCoRDMA: infinite loop in get_write_list_chunk_count
  • CVE-2018-7421: Multiple dissectors could go into large infinite loops (wnpa-sec-2018-06)
  • CVE-2018-7334: The UMTS MAC dissector could crash (wnpa-sec-2018-07)
  • CVE-2018-7337: The DOCSIS dissector could crash (wnpa-sec-2018-08)
  • CVE-2018-7336: The FCP dissector could crash (wnpa-sec-2018-09)
  • CVE-2018-7320: The SIGCOMP dissector could crash (wnpa-sec-2018-10)
  • CVE-2018-7420: The pcapng file parser could crash (wnpa-sec-2018-11)
  • CVE-2018-7417: The IPMI dissector could crash (wnpa-sec-2018-12)
  • CVE-2018-7418: The SIGCOMP dissector could crash (wnpa-sec-2018-13)
  • CVE-2018-7419: The NBAP disssector could crash (wnpa-sec-2018-14)
  • CVE-2017-17997: Misuse of NULL pointer in MRDISC dissector (bsc#1077080).
Record
SUSE-SU-2018:0811-1
Updated
2026-11-02
OSVSUSE-SU-2018:0867-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Security issue fixed (bsc#1082692):

  • CVE-2018-7335: The IEEE 802.11 dissector could crash (wnpa-sec-2018-05)
  • CVE-2018-7321: thrift long dissector loop (dissect_thrift_map)
  • CVE-2018-7322: DICOM: inifinite loop (dissect_dcm_tag)
  • CVE-2018-7323: WCCP: very long loop (dissect_wccp2_alternate_mask_value_set_element)
  • CVE-2018-7324: SCCP: infinite loop (dissect_sccp_optional_parameters)
  • CVE-2018-7325: RPKI-Router Protocol: infinite loop (dissect_rpkirtr_pdu)
  • CVE-2018-7326: LLTD: infinite loop (dissect_lltd_tlv)
  • CVE-2018-7327: openflow_v6: infinite loop (dissect_openflow_bundle_control_v6)
  • CVE-2018-7328: USB-DARWIN: long loop (dissect_darwin_usb_iso_transfer)
  • CVE-2018-7329: S7COMM: infinite loop (s7comm_decode_ud_cpu_alarm_main)
  • CVE-2018-7330: thread_meshcop: infinite loop (get_chancount)
  • CVE-2018-7331: GTP: infinite loop (dissect_gprscdr_GGSNPDPRecord, dissect_ber_set)
  • CVE-2018-7332: RELOAD: infinite loop (dissect_statans)
  • CVE-2018-7333: RPCoRDMA: infinite loop in get_write_list_chunk_count
  • CVE-2018-7421: Multiple dissectors could go into large infinite loops (wnpa-sec-2018-06)
  • CVE-2018-7334: The UMTS MAC dissector could crash (wnpa-sec-2018-07)
  • CVE-2018-7337: The DOCSIS dissector could crash (wnpa-sec-2018-08)
  • CVE-2018-7336: The FCP dissector could crash (wnpa-sec-2018-09)
  • CVE-2018-7320: The SIGCOMP dissector could crash (wnpa-sec-2018-10)
  • CVE-2018-7420: The pcapng file parser could crash (wnpa-sec-2018-11)
  • CVE-2018-7417: The IPMI dissector could crash (wnpa-sec-2018-12)
  • CVE-2018-7418: The SIGCOMP dissector could crash (wnpa-sec-2018-13)
  • CVE-2018-7419: The NBAP disssector could crash (wnpa-sec-2018-14)
  • CVE-2017-17997: Misuse of NULL pointer in MRDISC dissector (bsc#1077080).
Record
SUSE-SU-2018:0867-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
wireshark
Debian:12
 before 2.4.5-1
2.4.5-1
wireshark
Debian:13
 before 2.4.5-1
2.4.5-1
wireshark
Debian:14
 before 2.4.5-1
2.4.5-1
wireshark
SUSE:Linux Enterprise Desktop 12 SP2
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Desktop 12 SP3
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Software Development Kit 12 SP2
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Software Development Kit 12 SP3
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Server 12 SP2
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Server for SAP Applications 12 SP2
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
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Affected packages
PackageAffectedFixed
wireshark
SUSE:Linux Enterprise Server 12 SP3
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Server for SAP Applications 12 SP3
From an advisory covering 24 CVEs
 before 2.2.13-48.21.1
2.2.13-48.21.1
wireshark
SUSE:Linux Enterprise Software Development Kit 11 SP4
From an advisory covering 24 CVEs
 before 2.2.13-40.22.1
2.2.13-40.22.1
wireshark
SUSE:Linux Enterprise Server 11 SP4
From an advisory covering 24 CVEs
 before 2.2.13-40.22.1
2.2.13-40.22.1
wireshark
SUSE:Linux Enterprise Server for SAP Applications 11 SP4
From an advisory covering 24 CVEs
 before 2.2.13-40.22.1
2.2.13-40.22.1
wireshark
Ubuntu:14.04:LTS
 before 2.6.3-1~ubuntu14.04.1, plus listed versions
1.10.2-11.10.3-11.10.5-1ubuntu11.10.5-21.10.6-11.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1
2.6.3-1~ubuntu14.04.1
wireshark
Ubuntu:16.04:LTS
 before 2.6.3-1~ubuntu16.04.1, plus listed versions
1.12.7+g7fc8978-11.12.8+g5b6e543-22.0.1+g59ea380-3build12.0.2+ga16e22e-12.2.6+g32dac6a-2ubuntu0.16.04
2.6.3-1~ubuntu16.04.1
wireshark
Ubuntu:18.04:LTS
 before 2.6.3-1~ubuntu18.04.1, plus listed versions
2.4.2-12.4.3-12.4.4-12.4.5-1
2.6.3-1~ubuntu18.04.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-7421 is a high vulnerability (CVSS 7.5) in Wireshark, published February 23, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.70%, the 77th percentile. Fixed in wireshark 2.4.5-1.

References

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