CVE-2020-25862
HIGHCVSS 7.5/10EPSS 2.42%
Last modified
CVE-2020-25862 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the TCP dissector could crash. This was addressed in epan/dissectors/packet-tcp.c by changing the handling of the invalid 0xFFFF checksum.. EPSS estimates a 2.42% chance of exploitation in the next 30 days.
Description
In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the TCP dissector could crash. This was addressed in epan/dissectors/packet-tcp.c by changing the handling of the invalid 0xFFFF checksum.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wireshark | Wireshark | >= 2.6.0, <= 2.6.20 |
| Wireshark | Wireshark | >= 3.0.0, <= 3.0.13 |
| Wireshark | Wireshark | >= 3.2.0, <= 3.2.6 |
| Fedoraproject | Fedora | 31 |
| Fedoraproject | Fedora | 32 |
| Fedoraproject | Fedora | 33 |
| Opensuse | Leap | 15.1 |
| Opensuse | Leap | 15.2 |
| Debian | Debian Linux | 9.0 |
| Oracle | Zfs Storage Appliance Firmware | 8.8 |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.htmlMailing List, Third Party Advisory
- https://gitlab.com/wireshark/wireshark/-/commit/7f3fe6164a68b76d9988c4253b24d43f498f1753Patch, Third Party Advisory
- https://gitlab.com/wireshark/wireshark/-/issues/16816Exploit, Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00008.htmlMailing List, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2020-12.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.htmlMailing List, Third Party Advisory
- https://gitlab.com/wireshark/wireshark/-/commit/7f3fe6164a68b76d9988c4253b24d43f498f1753Patch, Third Party Advisory
- https://gitlab.com/wireshark/wireshark/-/issues/16816Exploit, Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00008.htmlMailing List, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2020-12.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-25862?
In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the TCP dissector could crash. This was addressed in epan/dissectors/packet-tcp.c by changing the handling of the invalid 0xFFFF checksum.
How severe is CVE-2020-25862?
CVE-2020-25862 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.42% probability of exploitation in the next 30 days.
How do I fix CVE-2020-25862?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2020-25862?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST