PT-2020-5495 · Wireshark+3 · Wireshark+3

Published 2020-10-06 · Updated 2024-06-15 · CVE-2020-26575

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Wireshark versions 3.2.7 and earlier

Description The issue is related to the Facebook Zero Protocol (FBZERO) dissector in Wireshark, which could enter an infinite loop. This could allow a remote attacker to cause a denial of service. The problem was addressed by correcting the implementation of offset advancement in the epan/dissectors/packet-fbzero.c file.

Recommendations For Wireshark versions 3.2.7 and earlier, update to a version where the issue has been fixed, which involves correcting the implementation of offset advancement in the epan/dissectors/packet-fbzero.c file. As a temporary workaround, consider disabling the FBZERO dissector function until a patch is available.

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

ALT-PU-2020-3204

ALT-PU-2020-3222

ALT-PU-2022-1368

BDU:2021-00876

CVE-2020-26575

DLA-2547-1

OESA-2021-1076

OPENSUSE-SU-2020:2076-1

OPENSUSE-SU-2020:2107-1

OPENSUSE-SU-2020_2076-1

OPENSUSE-SU-2020_2107-1

OPENSUSE-SU-2024:11513-1

SUSE-SU-2020:3376-1

SUSE-SU-2020_3376-1

Affected Products

Alt Linux

Astra Linux

Suse

Wireshark

References · 198

• https://osv.dev/vulnerability/SUSE-SU-2020:3376-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-26575 · Vendor Advisory
• https://security.gentoo.org/glsa/202011-08 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-26575 · Security Note
• https://gitlab.com/wireshark/wireshark/-/commit/3ff940652962c099b73ae3233322b8697b0d10ab · Patch
• https://wireshark.org/security/wnpa-sec-2020-14.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00876 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2020:2107-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1076 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-26575 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-26575 · Security Note
• https://gitlab.com/wireshark/wireshark/-/merge_requests/471 · Patch
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHZSVK7PO2LTGFQXFHFXY6SOMSQ7UPRS · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-26575 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2667E6WKVE56G66BVBVD7LJPIDOJ7K3 · Vendor Advisory