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 secalert@redhat.com
| Affected Software | Affected Version | How 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 Linux kernel | >=2.6.29<4.4.238 | |
| Linux Linux kernel | >=4.5<4.9.238 | |
| Linux Linux kernel | >=4.10<4.14.200 | |
| Linux Linux kernel | >=4.15<4.19.148 | |
| Linux Linux kernel | >=4.20<5.4.68 | |
| Linux Linux kernel | >=5.5<5.8.12 | |
| Linux Linux kernel | =5.9.0-rc1 | |
| Linux Linux kernel | =5.9.0-rc2 | |
| Linux Linux kernel | =5.9.0-rc3 | |
| Linux Linux kernel | =5.9.0-rc4 | |
| Linux Linux kernel | =5.9.0-rc5 | |
| Linux Linux kernel | =5.9.0-rc6 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| openSUSE Leap | =15.1 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| openSUSE Leap | =15.2 | |
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build12533 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build12658 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build12859 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build13170 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build13586 | |
| Starwindsoftware Starwind Virtual San Vsphere | =v8-build13861 | |
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-25643 https://nvd.nist.gov/vuln/detail/CVE-2020-25643 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66d42ed8b25b64eb63111a2b8582c5afc8bf1105
- https://bugzilla.redhat.com/show_bug.cgi?id=1879981
- https://access.redhat.com/errata/RHSA-2020:5441
- https://access.redhat.com/errata/RHSA-2020:5437
- https://access.redhat.com/errata/RHSA-2021:1739
- https://access.redhat.com/errata/RHSA-2021:1578
- https://access.redhat.com/security/cve/cve-2020-25643
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66d42ed8b25b64eb63111a2b8582c5afc8bf1105
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
- https://www.debian.org/security/2020/dsa-4774
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00028.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://security.netapp.com/advisory/ntap-20201103-0002/
- https://www.starwindsoftware.com/security/sw-20210325-0002/
- https://launchpad.net/bugs/cve/CVE-2020-25643
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=66d42ed8b25b64eb63111a2b8582c5afc8bf1105
- https://access.redhat.com/solutions/41278
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1883886
- https://git.kernel.org/linus/66d42ed8b25b64eb63111a2b8582c5afc8bf1105
- https://security-tracker.debian.org/tracker/CVE-2020-25643
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25643
- https://nvd.nist.gov/vuln/detail/CVE-2020-25643
- https://ubuntu.com/security/CVE-2020-25643
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-25643
- agent/software-canonical-lookup
- agent/weakness
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/references
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/2.6.29
- version/linux linux kernel/4.5
- version/linux linux kernel/4.10
- version/linux linux kernel/4.15
- version/linux linux kernel/4.20
- version/linux linux kernel/5.5
- version/linux linux kernel/5.9.0-rc1
- version/linux linux kernel/5.9.0-rc2
- version/linux linux kernel/5.9.0-rc3
- version/linux linux kernel/5.9.0-rc4
- version/linux linux kernel/5.9.0-rc5
- version/linux linux kernel/5.9.0-rc6
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/7.0
- version/redhat enterprise linux/8.0
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.1
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- version/opensuse leap/15.2
- vendor/netapp
- canonical/netapp h410c firmware
- canonical/netapp h410c
- vendor/starwindsoftware
- canonical/starwindsoftware starwind virtual san vsphere
- version/starwindsoftware starwind virtual san vsphere/v8-build12533
- version/starwindsoftware starwind virtual san vsphere/v8-build12658
- version/starwindsoftware starwind virtual san vsphere/v8-build12859
- version/starwindsoftware starwind virtual san vsphere/v8-build13170
- version/starwindsoftware starwind virtual san vsphere/v8-build13586
- version/starwindsoftware starwind virtual san vsphere/v8-build13861
- package-manager/debian