CVE-2020-28374: Path Traversal
First published: Fri Nov 20 2020(Updated: )
A flaw was found in the Linux kernel’s implementation of the Linux SCSI target host, where an authenticated attacker could write to any block on the exported SCSI device backing store. This flaw allows an authenticated attacker to send LIO block requests to the Linux system to overwrite data on the backing store. The highest threat from this vulnerability is to integrity. In addition, this flaw affects the tcmu-runner package, where the affected SCSI command is called.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.21.1.rt56.1158.el7 | 0:3.10.0-1160.21.1.rt56.1158.el7 |
| redhat/kernel | <0:3.10.0-1160.21.1.el7 | 0:3.10.0-1160.21.1.el7 |
| redhat/kernel | <0:3.10.0-693.90.2.el7 | 0:3.10.0-693.90.2.el7 |
| redhat/kernel | <0:3.10.0-957.72.1.el7 | 0:3.10.0-957.72.1.el7 |
| redhat/kernel | <0:3.10.0-1062.49.1.el7 | 0:3.10.0-1062.49.1.el7 |
| redhat/kernel-rt | <0:4.18.0-240.22.1.rt7.77.el8_3 | 0:4.18.0-240.22.1.rt7.77.el8_3 |
| redhat/kernel | <0:4.18.0-240.22.1.el8_3 | 0:4.18.0-240.22.1.el8_3 |
| redhat/kernel | <0:4.18.0-147.48.1.el8_1 | 0:4.18.0-147.48.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.56.1.rt13.106.el8_2 | 0:4.18.0-193.56.1.rt13.106.el8_2 |
| redhat/kernel | <0:4.18.0-193.56.1.el8_2 | 0:4.18.0-193.56.1.el8_2 |
| Linux Linux kernel | <5.10.7 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.6-1 |
Remedy
XCOPY support is enabled by default, but can be disabled via: echo 0 > /sys/kernel/config/target/core/<backstore>/<name>/attrib/emulate_3pc or targetcli /backstores/<backstore>/<name> set attribute emulate_3pc=0 . This workaround does *not* affect XCOPY requests sent to tcmu-runner based backstores.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-28374 https://nvd.nist.gov/vuln/detail/CVE-2020-28374
- https://bugzilla.redhat.com/show_bug.cgi?id=1899804
- https://access.redhat.com/errata/RHSA-2021:0857
- https://access.redhat.com/errata/RHSA-2021:0856
- https://access.redhat.com/errata/RHSA-2021:0862
- https://access.redhat.com/errata/RHSA-2021:2732
- https://access.redhat.com/errata/RHSA-2021:1376
- https://access.redhat.com/errata/RHSA-2021:1377
- https://access.redhat.com/errata/RHSA-2021:1531
- https://access.redhat.com/errata/RHSA-2021:1532
- https://access.redhat.com/errata/RHSA-2021:1081
- https://access.redhat.com/errata/RHSA-2021:1093
- https://access.redhat.com/errata/RHSA-2021:2099
- https://access.redhat.com/errata/RHSA-2021:2106
- https://access.redhat.com/errata/RHSA-2021:2190
- https://access.redhat.com/errata/RHSA-2021:2167
- https://access.redhat.com/errata/RHSA-2021:2185
- https://access.redhat.com/security/cve/cve-2020-28374
- http://packetstormsecurity.com/files/161229/Kernel-Live-Patch-Security-Notice-LSN-0074-1.html
- http://www.openwall.com/lists/oss-security/2021/01/13/2
- http://www.openwall.com/lists/oss-security/2021/01/13/5
- https://bugzilla.suse.com/attachment.cgi?id=844938
- https://bugzilla.suse.com/show_bug.cgi?id=1178372
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.7
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2896c93811e39d63a4d9b63ccf12a8fbc226e5e4
- https://github.com/torvalds/linux/commit/2896c93811e39d63a4d9b63ccf12a8fbc226e5e4
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FZEUPID5DZYLZBIO4BEVLHFUDZZIFL57/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HK7SRTITN5ABAUOOIGFVR7XE5YKYYAVO/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LTGQDYIEO2GOCOOKADBHEITF44GY55QF/
- https://security.netapp.com/advisory/ntap-20210219-0002/
- https://www.debian.org/security/2021/dsa-4843
- https://launchpad.net/bugs/cve/CVE-2020-28374
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZEUPID5DZYLZBIO4BEVLHFUDZZIFL57/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HK7SRTITN5ABAUOOIGFVR7XE5YKYYAVO/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LTGQDYIEO2GOCOOKADBHEITF44GY55QF/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1915786
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1915787
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1916045
- https://git.kernel.org/linus/2896c93811e39d63a4d9b63ccf12a8fbc226e5e4
- https://www.openwall.com/lists/oss-security/2021/01/12/12
- https://security-tracker.debian.org/tracker/CVE-2020-28374
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28374
- https://nvd.nist.gov/vuln/detail/CVE-2020-28374
- https://ubuntu.com/security/CVE-2020-28374
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/weakness
- agent/severity
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-28374
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/remedy
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/last-modified-date
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/32
- version/fedoraproject fedora/33
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- package-manager/debian