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Red Hat Enterprise Linux: RHSA-2021-4236 Low Severity Tcpdump Memory Issue

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
An update for tcpdump is now released for Red Hat Enterprise Linux, addressing low severity issues related to memory allocation practices.
An update for tcpdump is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The tcpdump packages contain the tcpdump utility for monitoring network traffic. The tcpdump utility can capture and display the packet headers on a particular network interface or on all interfaces.
Security Fix(es):
* tcpdump: ppp decapsulator can be convinced to allocate a large amount of memory (CVE-2020-8037)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory tcpdump security fix Red Hat Enterprise Linux low severity network utility memory allocation issue

References

https://access.redhat.com/security/cve/CVE-2020-8037 https://access.redhat.com/security/updates/classification#low https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: tcpdump-4.9.3-2.el8.src.rpm
aarch64: tcpdump-4.9.3-2.el8.aarch64.rpm tcpdump-debuginfo-4.9.3-2.el8.aarch64.rpm tcpdump-debugsource-4.9.3-2.el8.aarch64.rpm
ppc64le: tcpdump-4.9.3-2.el8.ppc64le.rpm tcpdump-debuginfo-4.9.3-2.el8.ppc64le.rpm tcpdump-debugsource-4.9.3-2.el8.ppc64le.rpm
s390x: tcpdump-4.9.3-2.el8.s390x.rpm tcpdump-debuginfo-4.9.3-2.el8.s390x.rpm tcpdump-debugsource-4.9.3-2.el8.s390x.rpm
x86_64: tcpdump-4.9.3-2.el8.x86_64.rpm tcpdump-debuginfo-4.9.3-2.el8.x86_64.rpm tcpdump-debugsource-4.9.3-2.el8.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4236-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4236
Issue date: 2021-11-09

Topic

An update for tcpdump is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Low. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory tcpdump security fix Red Hat Enterprise Linux low severity network utility memory allocation issue

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1860216 - tcpdump can not parse mptcp options

1895080 - CVE-2020-8037 tcpdump: ppp decapsulator can be convinced to allocate a large amount of memory

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