Amazon Linux 2 Security Advisory: ALASLIVEPATCH-2020-010
Advisory Release Date: 2020-05-11 20:51 Pacific
Advisory Updated Date: 2020-05-12 15:41 Pacific
Severity:
Important
Issue Overview:
A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.(CVE-2020-10711)
Affected Packages:
kernel-livepatch-4.14.177-139.253
Issue Correction:
Please ensure you have live patching enabled.
Run yum update kernel-livepatch-4.14.177-139.253 to update your system.
New Packages:
src:
kernel-livepatch-4.14.177-139.253-1.0-2.amzn2.src
x86_64:
kernel-livepatch-4.14.177-139.253-1.0-2.amzn2.x86_64
kernel-livepatch-4.14.177-139.253-debuginfo-1.0-2.amzn2.x86_64