Home/CVE/A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read ove
CVE

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 ove

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.

HIGH · CVSS 7.2 EPSS 0.00262
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
CWE-20Improper Input Validation
▤

Affected Products & Versions

12
linux kernel>= 2.6.29 and < 4.4.238
linux kernel>= 4.5 and < 4.9.238
linux kernel>= 4.10 and < 4.14.200
linux kernel>= 4.15 and < 4.19.148
linux kernel>= 4.20 and < 5.4.68
linux kernel>= 5.5 and < 5.8.12
linux kernelall versions
redhat enterprise linuxall versions
▣

Scoring & Timeline

7.2
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Oct 2020 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

27
rhsaRHSA-2021:1578Moderate
rhsaRHSA-2021:1739Moderate
usnUSN-4752-1
suse-csafSUSE-SU-2021:14630-1
suse-csafopenSUSE-SU-2021:0242-1
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.htmlMailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1879981Issue TrackingPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66d42ed8b25b64eb63111a2b8582c5afc8bf1105Mailing ListPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00028.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing ListThird Party Advisory
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