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Vulnerability Details : CVE-2020-25643

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.
Publish Date : 2020-10-06 Last Update Date : 2020-11-03
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication ???
Gained Access None
Vulnerability Type(s) Denial Of ServiceOverflowMemory corruption
CWE ID 20

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:5437: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20205437 unix
RHSA-2020:5441: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20205441 unix
RHSA-2021:1578: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20211578 unix
RHSA-2021:1739: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20211739 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2020-25643

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
2 OS Linux Linux Kernel 5.9.0 RC6 * * Version Details Vulnerabilities
3 OS Linux Linux Kernel 5.9.0 RC1 * * Version Details Vulnerabilities
4 OS Linux Linux Kernel 5.9.0 RC2 * * Version Details Vulnerabilities
5 OS Linux Linux Kernel 5.9.0 RC3 * * Version Details Vulnerabilities
6 OS Linux Linux Kernel 5.9.0 RC4 * * Version Details Vulnerabilities
7 OS Linux Linux Kernel 5.9.0 RC5 * * Version Details Vulnerabilities
8 OS Linux Linux Kernel 5.9.0 - * * Version Details Vulnerabilities
9 OS Opensuse Leap 15.1 * * * Version Details Vulnerabilities
10 OS Redhat Enterprise Linux 7.0 * * * Version Details Vulnerabilities
11 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 8
Opensuse Leap 1
Redhat Enterprise Linux 2

- References For 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
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
SUSE openSUSE-SU-2020:1655
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
SUSE openSUSE-SU-2020:1698
https://www.debian.org/security/2020/dsa-4774
DEBIAN DSA-4774
https://lists.debian.org/debian-lts-announce/2020/10/msg00028.html
MLIST [debian-lts-announce] 20201028 [SECURITY] [DLA 2417-1] linux-4.19 security update
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
MLIST [debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression update
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
MLIST [debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security update
https://security.netapp.com/advisory/ntap-20201103-0002/ CONFIRM

- Metasploit Modules Related To CVE-2020-25643

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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