CVE-2021-20197

There is an open race window when writing output in the following utilities in GNU binutils version 2.35 and earlier:ar, objcopy, strip, ranlib. When these utilities are run as a privileged user (presumably as part of a script updating binaries across different users), an unprivileged user can trick these utilities into getting ownership of arbitrary files through a symlink.

CVSS v3 6.3 MEDIUM
CVSS v2.0 3.3 LOW

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

3.3^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:M/Au:N/C:P/I:P/A:N

Exploitability : 3.4 / Impact : 4.9

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1913743	Issue Tracking Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-30	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210528-0009/	Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=26945	Issue Tracking Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:binutils:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:a:netapp:cloud_backup:-:::::::*
	cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:::::::*
	cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:::::::*
	cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:::::::*

History

No history.

Information

Published : 2021-03-26 17:15

Updated : 2024-02-28 18:28

NVD link : CVE-2021-20197

Mitre link : CVE-2021-20197

CVE.ORG link : CVE-2021-20197

JSON object : View

Products Affected

redhat

enterprise_linux

gnu

binutils

netapp

solidfire_\&_hci_management_node
cloud_backup
ontap_select_deploy_administration_utility

broadcom

brocade_fabric_operating_system_firmware

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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