Every CVE Search/ Get API key

CVE-2020-25866

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer...

7.5 HighFix available

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

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

3.99%Up 1.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
CVE-2020-25866
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-476
Updated
2026-11-02
CVE List No score

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
CVE-2020-25866
Updated
2026-11-02
EUVDEUVD-2020-18498 No score

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
EUVD-2020-18498
Updated
2026-11-03
GitHub AdvisoriesGHSA-j5p6-gc45-8fh8 7.5

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer...

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
GHSA-j5p6-gc45-8fh8
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-476
Updated
2026-11-02
OSVALPINE-CVE-2020-25866 7.5

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
ALPINE-CVE-2020-25866
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
2026-11-03
OSV 7.5

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
CVE-2020-25866
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
Show 7 moreShow less
OSVDEBIAN-CVE-2020-25866 7.5

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
DEBIAN-CVE-2020-25866
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-2020-25866 7.5

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Record
UBUNTU-CVE-2020-25866
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
OSVMGASA-2020-0384 No score

Updated wireshark packages fix security vulnerabilities

The TCP dissector could crash (CVE-2020-25862).

The MIME Multipart dissector could crash (CVE-2020-25863).

The BLIP dissector could crash (CVE-2020-25866).

Record
MGASA-2020-0384
Updated
2026-11-02
OSVopenSUSE-SU-2020:1878-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

  • Update to wireshark 3.2.7:
    • CVE-2020-25863: MIME Multipart dissector crash (bsc#1176908)
    • CVE-2020-25862: TCP dissector crash (bsc#1176909)
    • CVE-2020-25866: BLIP dissector crash (bsc#1176910)
    • CVE-2020-17498: Kafka dissector crash (bsc#1175204)

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2020:1878-1
Updated
2026-11-02
OSVopenSUSE-SU-2020:1882-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

  • Update to wireshark 3.2.7:
    • CVE-2020-25863: MIME Multipart dissector crash (bsc#1176908)
    • CVE-2020-25862: TCP dissector crash (bsc#1176909)
    • CVE-2020-25866: BLIP dissector crash (bsc#1176910)
    • CVE-2020-17498: Kafka dissector crash (bsc#1175204)

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2020:1882-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11513-1 No score

libwireshark14-3.4.8-1.2 on GA media

These are all security issues fixed in the libwireshark14-3.4.8-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11513-1
Updated
2026-11-02
OSVSUSE-SU-2020:3166-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

  • Update to wireshark 3.2.7:
    • CVE-2020-25863: MIME Multipart dissector crash (bsc#1176908)
    • CVE-2020-25862: TCP dissector crash (bsc#1176909)
    • CVE-2020-25866: BLIP dissector crash (bsc#1176910)
    • CVE-2020-17498: Kafka dissector crash (bsc#1175204)
Record
SUSE-SU-2020:3166-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
wireshark
Alpine:v3.10
 3.0.0 up to 3.0.14-r0
3.0.14-r0
wireshark
Alpine:v3.11
 3.0.0 up to 3.0.14-r0
3.0.14-r0
wireshark
Alpine:v3.12
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.13
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.14
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.15
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.16
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.17
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.18
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.19
 3.0.0 up to 3.2.7-r0
3.2.7-r0
Show 20 moreShow less
Affected packages
PackageAffectedFixed
wireshark
Alpine:v3.20
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.21
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.22
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.23
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Alpine:v3.24
 3.0.0 up to 3.2.7-r0
3.2.7-r0
wireshark
Debian:12
 before 3.2.7-1
3.2.7-1
wireshark
Debian:13
 before 3.2.7-1
3.2.7-1
wireshark
Debian:14
 before 3.2.7-1
3.2.7-1
wireshark
Mageia:7
From an advisory covering 3 CVEs
 before 3.0.14-1.mga7
3.0.14-1.mga7
wireshark
SUSE:Linux Enterprise Module for Basesystem 15 SP1
From an advisory covering 4 CVEs
 before 3.2.7-3.41.1
3.2.7-3.41.1
wireshark
SUSE:Linux Enterprise Module for Basesystem 15 SP2
From an advisory covering 4 CVEs
 before 3.2.7-3.41.1
3.2.7-3.41.1
wireshark
SUSE:Linux Enterprise Module for Desktop Applications 15 SP1
From an advisory covering 4 CVEs
 before 3.2.7-3.41.1
3.2.7-3.41.1
wireshark
SUSE:Linux Enterprise Module for Desktop Applications 15 SP2
From an advisory covering 4 CVEs
 before 3.2.7-3.41.1
3.2.7-3.41.1
wireshark
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1.10.2-11.10.3-11.10.5-1ubuntu11.10.5-21.10.6-1
Show 9 moreShow less
1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.12.6.3-1~ubuntu14.04.12.6.4-2~ubuntu14.04.12.6.5-1~ubuntu14.04.12.6.6-1~ubuntu14.04.02.6.8-1~ubuntu14.04.0~esm12.6.10-1~ubuntu14.04.0~esm12.6.10-1~ubuntu14.04.0~esm22.6.10-1~ubuntu14.04.0~esm3
 None known
wireshark
Ubuntu:Pro:16.04:LTS
 All versions, 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
Show 8 moreShow less
2.6.3-1~ubuntu16.04.12.6.4-2~ubuntu16.04.02.6.5-1~ubuntu16.04.02.6.6-1~ubuntu16.04.02.6.8-1~ubuntu16.04.02.6.10-1~ubuntu16.04.02.6.10-1~ubuntu16.04.0+esm12.6.10-1~ubuntu16.04.0+esm2
 None known
wireshark
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
2.4.2-12.4.3-12.4.4-12.4.5-12.6.3-1~ubuntu18.04.1
Show 7 moreShow less
2.6.4-2~ubuntu18.04.02.6.5-1~ubuntu18.04.02.6.6-1~ubuntu18.04.02.6.8-1~ubuntu18.04.02.6.10-1~ubuntu18.04.02.6.10-1~ubuntu18.04.0+esm12.6.10-1~ubuntu18.04.0+esm2
 None known
wireshark
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
3.0.5-13.0.7-13.2.1-13.2.2-13.2.3-13.2.3-1ubuntu0.1~esm13.2.3-1ubuntu0.1~esm2
 None known
wireshark
openSUSE:Leap 15.1
From an advisory covering 4 CVEs
 before 3.2.7-lp151.2.15.1
3.2.7-lp151.2.15.1
wireshark
openSUSE:Leap 15.2
From an advisory covering 4 CVEs
 before 3.2.7-lp152.2.6.1
3.2.7-lp152.2.6.1
wireshark
openSUSE:Tumbleweed
From an advisory covering 163 CVEs
 before 3.4.8-1.2
3.4.8-1.2

History

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

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

In short

CVE-2020-25866 is a high vulnerability (CVSS 7.5) in Wireshark, published October 6, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.99%, the 90th percentile. Fixed in wireshark 3.0.14-r0.

References

Show 189 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open