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CVE-2021-3139

Published: 13 January 2021

In Open-iSCSI tcmu-runner 1.3.x, 1.4.x, and 1.5.x through 1.5.2, xcopy_locate_udev in tcmur_cmd_handler.c lacks a check for transport-layer restrictions, allowing remote attackers to read or write files via directory traversal in an XCOPY request. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. NOTE: relative to CVE-2020-28374, this is a similar mistake in a different algorithm.

Notes

AuthorNote
alexmurray
Related to CVE-2020-28374

Priority

Medium

Cvss 3 Severity Score

8.1

Score breakdown

Status

Package Release Status
tcmu
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (1.5.2-5ubuntu0.20.04.1)
groovy
Released (1.5.2-5ubuntu0.20.10.1)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Needed

kinetic Ignored
(end of life, was needed)
lunar Ignored
(end of life, was needed)
mantic Needed

trusty Does not exist

upstream Needs triage

xenial Does not exist

Patches:
upstream: https://github.com/open-iscsi/tcmu-runner/commit/b4a986b0d1233a8a6f2d340133c2efaa1d9e8c14

Severity score breakdown

Parameter Value
Base score 8.1
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N