high
7.5
CWE
20
Advisory Published
CVE Published
CVE Published
Updated

CVE-2020-25643: Input Validation

First published: Thu Sep 17 2020(Updated: )

A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:3.10.0-1160.11.1.rt56.1145.el7
0:3.10.0-1160.11.1.rt56.1145.el7
redhat/kernel<0:3.10.0-1160.11.1.el7
0:3.10.0-1160.11.1.el7
redhat/kernel-rt<0:4.18.0-305.rt7.72.el8
0:4.18.0-305.rt7.72.el8
redhat/kernel<0:4.18.0-305.el8
0:4.18.0-305.el8
redhat/Linux kernel<5.9
5.9
Linux Kernel>=2.6.29<4.4.238
Linux Kernel>=4.5<4.9.238
Linux Kernel>=4.10<4.14.200
Linux Kernel>=4.15<4.19.148
Linux Kernel>=4.20<5.4.68
Linux Kernel>=5.5<5.8.12
Linux Kernel=5.9.0-rc1
Linux Kernel=5.9.0-rc2
Linux Kernel=5.9.0-rc3
Linux Kernel=5.9.0-rc4
Linux Kernel=5.9.0-rc5
Linux Kernel=5.9.0-rc6
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
openSUSE=15.1
Debian GNU/Linux=9.0
Debian GNU/Linux=10.0
openSUSE=15.2
All of
netapp h410c firmware
netapp h410c
StarWind Virtual SAN=v8-build12533
StarWind Virtual SAN=v8-build12658
StarWind Virtual SAN=v8-build12859
StarWind Virtual SAN=v8-build13170
StarWind Virtual SAN=v8-build13586
StarWind Virtual SAN=v8-build13861
netapp h410c firmware
netapp h410c
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.15-1

Remedy

To mitigate this issue, prevent modules hdlc_ppp, syncppp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1879981

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66d42ed8b25b64eb63111a2b8582c5afc8bf1105

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-25643?

    CVE-2020-25643 has a high severity rating due to its potential to cause memory corruption and denial of service.

  • How do I fix CVE-2020-25643?

    To fix CVE-2020-25643, update your Linux kernel to version 5.9 or later, or to the latest patched version such as 0:3.10.0-1160.11.1.el7.

  • Which Linux kernel versions are affected by CVE-2020-25643?

    CVE-2020-25643 affects Linux kernel versions prior to 5.9-rc7, specifically versions 2.6.29 to 5.8.12.

  • What types of systems are impacted by CVE-2020-25643?

    CVE-2020-25643 impacts various Linux distributions, including Red Hat Enterprise Linux, Debian, and openSUSE.

  • Can CVE-2020-25643 lead to system crashes?

    Yes, CVE-2020-25643 can lead to system crashes or denial of service due to improper input validation in the HDLC_PPP module.

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