SB2021110516 - IBM Security Guardium update for Linux kernel

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Use of insufficiently random values (CVE-ID: CVE-2020-25705)

The vulnerability allows a remote attacker to gain access to sensitive information.

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well.

2) Path traversal (CVE-ID: CVE-2020-28374)

The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in drivers/target/target_core_xcopy.c in the Linux kernel. A remote user with access to iSCSI LUN can send a specially crafted XCOPY request and read or write arbitrary files on the system.

Remediation

Install update from vendor's website.

References

• https://www.ibm.com/blogs/psirt/security-bulletin-ibm-security-guardium-is-affected-by-a-kernel-vulnerability-cve-2020-25705-cve-2020-28374-4/"
• https://www.ibm.com/blogs/psirt/security-bulletin-ibm-security-guardium-is-affected-by-a-kernel-vulnerability-cve-2020-25705-cve-2020-28374-4/</a></p><p>
• https://www.ibm.com/support/pages/node/6459941</p><p><br></p>