CVE-2020-28374 log

Severity Medium
Remote No
Type Directory traversal
In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can be used by remote attackers to read or write files via directory traversal in an XCOPY request, aka CID-2896c93811e3. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. The attacker gains control over file access because I/O operations are proxied via an attacker-selected backstore.
Group Package Affected Fixed Severity Status Ticket
AVG-1445 linux-lts 5.4.88-1 5.4.89-1 Medium Fixed
AVG-1444 linux-zen 5.10.6.zen1-1 5.10.7.zen1-1 Medium Fixed
AVG-1443 linux-hardened 5.10.6.a-1 5.10.7.a-1 Medium Fixed
AVG-1442 linux 5.10.6.arch1-1 5.10.7.arch1-1 Medium Fixed

The issue can be mitigated by disabling XCOPY support:

# echo 0 > /sys/kernel/config/target/core/<backstore>/<name>/attrib/emulate_3pc