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CVE-2020-27815

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Date: May 26, 2021

A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Language: C

Severity Score

Related Resources (19)

https://www.debian.org/security/2021/dsa-4843
https://access.redhat.com/security/cve/CVE-2020-27815
http://www.openwall.com/lists/oss-security/2020/12/28/1
https://github.com/gregkh/linux/commit/c61b3e4839007668360ed8b87d7da96d2e59fc6c
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6c
https://nvd.nist.gov/vuln/detail/CVE-2020-27815
https://www.openwall.com/lists/oss-security/2020/11/30/5%2C
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
https://bugzilla.redhat.com/show_bug.cgi?id=1897668,
https://bugzilla.redhat.com/show_bug.cgi?id=1897668%2C
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-27815
https://security-tracker.debian.org/tracker/CVE-2020-27815
https://www.openwall.com/lists/oss-security/2020/12/28/1%2C
https://www.openwall.com/lists/oss-security/2020/11/30/5,
http://www.openwall.com/lists/oss-security/2020/11/30/5
https://www.openwall.com/lists/oss-security/2020/12/28/1,
https://security.netapp.com/advisory/ntap-20210702-0004/
https://www.mend.io/vulnerability-database/CVE-2020-27815

Severity Score

Weakness Type (CWE)

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-119

Out-of-bounds Write

CWE-787

Top Fix

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Upgrade Version

Upgrade to version linux-libc-headers - 5.13;linux-yocto - 4.8.26+gitAUTOINC+1c60e003c7_27efc3ba68

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): COMPLETE
Additional information:

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