CVE-2020-26541: Infoleak
First published: Tue Sep 15 2020(Updated: )
A flaw was found in the Linux kernel in certs/blacklist.c, When signature entries for EFI_CERT_X509_GUID are contained in the Secure Boot Forbidden Signature Database, the entries are skipped. This can cause a security threat and breach system integrity, confidentiality and even lead to a denial of service problem.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-305.7.1.rt7.79.el8_4 | 0:4.18.0-305.7.1.rt7.79.el8_4 |
| redhat/kernel | <0:4.18.0-305.7.1.el8_4 | 0:4.18.0-305.7.1.el8_4 |
| redhat/kernel | <0:4.18.0-147.51.1.el8_1 | 0:4.18.0-147.51.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.60.2.rt13.112.el8_2 | 0:4.18.0-193.60.2.rt13.112.el8_2 |
| redhat/kernel | <0:4.18.0-193.60.2.el8_2 | 0:4.18.0-193.60.2.el8_2 |
| Linux Linux kernel | <=5.8.13 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-26541 https://nvd.nist.gov/vuln/detail/CVE-2020-26541
- https://bugzilla.redhat.com/show_bug.cgi?id=1886285
- https://access.redhat.com/errata/RHSA-2021:2599
- https://access.redhat.com/errata/RHSA-2021:2570
- https://access.redhat.com/errata/RHSA-2021:2666
- https://access.redhat.com/errata/RHSA-2021:2719
- https://access.redhat.com/errata/RHSA-2021:2718
- https://access.redhat.com/errata/RHBA-2021:2854
- https://access.redhat.com/security/cve/cve-2020-26541
- https://lkml.org/lkml/2020/9/15/1871
- https://launchpad.net/bugs/cve/CVE-2020-26541
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1886287
- https://security-tracker.debian.org/tracker/CVE-2020-26541
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26541
- https://nvd.nist.gov/vuln/detail/CVE-2020-26541
- https://ubuntu.com/security/CVE-2020-26541
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-26541
- agent/author
- agent/weakness
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- collector/security-tracker-debian
- source/Debian
- agent/remedy
- agent/references
- agent/softwarecombine
- agent/tags
- agent/description
- agent/event
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.8.13
- package-manager/debian