Bug 2025686 (CVE-2021-39923, wnpa-sec-2021-11) - CVE-2021-39923 wireshark: PNRP dissector large loop
Summary: CVE-2021-39923 wireshark: PNRP dissector large loop
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-39923, wnpa-sec-2021-11
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2025687 2030035
Blocks: 2025696
TreeView+ depends on / blocked
 
Reported: 2021-11-22 18:15 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-04-18 02:10 UTC (History)
8 users (show)

Fixed In Version: wireshark 3.4.10
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Wireshark. A process failure consumes excessive CPU resources on crafted or malformed PNRP input and can cause a denial of service.
Clone Of:
Environment:
Last Closed: 2022-04-18 02:10:08 UTC
Embargoed:


Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2021-11-22 18:15:15 UTC
The PNRP dissector could go into a large loop. It may be possible to make Wireshark consume excessive CPU resources by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

Reference:
https://www.wireshark.org/security/wnpa-sec-2021-11.html

Comment 1 Guilherme de Almeida Suckevicz 2021-11-22 18:15:40 UTC
Created wireshark tracking bugs for this issue:

Affects: fedora-all [bug 2025687]

Comment 11 Product Security DevOps Team 2022-04-18 02:10:06 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-39923


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