Security Bulletin: IBM Storage Ceph is vulnerable to Improper Link Resolution Before File Access or Time-of-check Time-of-use Race Condition in the RHEL UBI (CVE-2021-35937)

Summary

RHEL UBI is used by IBM Storage Ceph as the base operating system. This bulletin identifies the steps to take to address the vulnerability in the RHEL UBI. CVE-2021-35937

Vulnerability Details

CVEID:CVE-2021-35937
**DESCRIPTION:**RPM Project RPM could allow a local authenticated attacker to gain elevated privileges on the system, caused by a TOCTOU race in checks for unsafe symlinks. An attacker could exploit this vulnerability to bypass the checks that were introduced in response to CVE-2017-7500 and CVE-2017-7501 and gain root privileges on the system.
CVSS Base score: 6.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/211335 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H)

Affected Products and Versions

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now.
Download the latest version of IBM Storage Ceph and upgrade to 7.0 by following instructions.

<https://public.dhe.ibm.com/ibmdl/export/pub/storage/ceph/&gt;
<https://www.ibm.com/docs/en/storage-ceph/6?topic=upgrading&gt;

Workarounds and Mitigations

None