Bug 1895080 (CVE-2020-8037)

Summary: CVE-2020-8037 tcpdump: ppp decapsulator can be convinced to allocate a large amount of memory
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: kyoshida, luhliari, mruprich, msehnout, msekleta
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: tcpdump 4.10.0rc1 Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in tcpdump while printing PPP packets captured in a pcap file or coming from the network. This flaw allows a remote attacker to send specially crafted packets that, when printed, can lead the application to allocate a large amount of memory, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-11-10 01:54:35 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1895082, 1901635    
Bug Blocks: 1895083    

Description Guilherme de Almeida Suckevicz 2020-11-05 17:10:27 UTC
The ppp decapsulator in tcpdump 4.9.3 can be convinced to allocate a large amount of memory.

Reference and upstream patch:
https://github.com/the-tcpdump-group/tcpdump/commit/32027e199368dad9508965aae8cd8de5b6ab5231

Comment 1 Guilherme de Almeida Suckevicz 2020-11-05 17:13:28 UTC
Created tcpdump tracking bugs for this issue:

Affects: fedora-all [bug 1895082]

Comment 3 errata-xmlrpc 2021-11-09 17:52:52 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4236 https://access.redhat.com/errata/RHSA-2021:4236

Comment 4 Product Security DevOps Team 2021-11-10 01:54:34 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-2020-8037