Vulnerability in Broadcom Brocade Fabric Operating System Firmware
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.
EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Broadcom Brocade_fabric_operating_system_firmware
- Gnu Binutils
- Netapp Cloud_backup
- Netapp Ontap_select_deploy_administration_utility
- Netapp Solidfire_\&_hci_management_node
- Redhat Enterprise_linux — versions 8.0
- N/a Binutils — versions binutils 2.35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2021-20197?
- CVE-2021-20197 is a medium-severity vulnerability in Broadcom Brocade Fabric Operating System Firmware, classified under Improper Link Resolution Before File Access. CVSS score: 6.3/10. Published 2021-03-26.
- How severe is CVE-2021-20197?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2021-20197 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.