CVE-2020-25862: Vulnerability Analysis & Exploit Details

CVE-2020-25862 Vulnerability Summary

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.

CVE-2020-25862: Detailed Information and External References

EPSS

0.00459

EPSS %

0.75344

References

0.00459

• http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.html
• http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.html
• https://gitlab.com/wireshark/wireshark/-/commit/7f3fe6164a68b76d9988c4253b24d43f498f1753
• https://gitlab.com/wireshark/wireshark/-/issues/16816
• https://lists.debian.org/debian-lts-announce/2021/02/msg00008.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW/
• https://www.oracle.com/security-alerts/cpujan2021.html
• https://www.wireshark.org/security/wnpa-sec-2020-12.html

CWE

CWE-354

CAPEC

0.00459

• Checksum Spoofing: An adversary spoofs a checksum message for the purpose of making a payload appear to have a valid corresponding checksum. Checksums are used to verify message integrity. They consist of some value based on the value of the message they are protecting. Hash codes are a common checksum mechanism. Both the sender and recipient are able to compute the checksum based on the contents of the message. If the message contents change between the sender and recipient, the sender and recipient will compute different checksum values. Since the sender's checksum value is transmitted with the message, the recipient would know that a modification occurred. In checksum spoofing an adversary modifies the message body and then modifies the corresponding checksum so that the recipient's checksum calculation will match the checksum (created by the adversary) in the message. This would prevent the recipient from realizing that a change occurred.
• Padding Oracle Crypto Attack: An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.
• Manipulating Writeable Configuration Files: Generally these are manually edited files that are not in the preview of the system administrators, any ability on the attackers' behalf to modify these files, for example in a CVS repository, gives unauthorized access directly to the application, the same as authorized users.

Vulnerable Configurations

• cpe:2.3:a:wireshark:wireshark:2.6.0:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.1:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.2:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.3:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.3:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.4:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.4:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.5:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.5:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.6:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.6:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.7:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.7:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.8:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.8:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.9:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.9:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.10:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.10:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.11:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.11:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.12:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.12:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.13:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.13:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.14:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.14:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.15:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.15:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.16:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.16:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.17:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.17:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.18:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.18:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.19:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.19:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:2.6.20:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:2.6.20:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.0:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.1:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.2:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.3:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.4:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.5:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.6:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.7:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.8:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.9:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.10:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.11:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.11:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.12:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.12:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.0.13:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.0.13:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.2.0:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.2.1:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.2.2:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.2.3:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.2.4:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.2.5:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:wireshark:wireshark:3.2.6:*:*:*:*:*:*:*
  cpe:2.3:a:wireshark:wireshark:3.2.6:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
  cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
  cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
  cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:zfs_storage_appliance_firmware:8.8:*:*:*:*:*:*:*
  cpe:2.3:o:oracle:zfs_storage_appliance_firmware:8.8:*:*:*:*:*:*:*
• cpe:2.3:h:oracle:zfs_storage_appliance_firmware:-:*:*:*:*:*:*:*
  cpe:2.3:h:oracle:zfs_storage_appliance_firmware:-:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H