SB2021080816 - Observable discrepancy in Linux kernel
Published: August 8, 2021
Security Bulletin ID
SB2021080816
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Observable discrepancy (CVE-ID: CVE-2021-38209)
The vulnerability allows a local user to gain access to sensitive information.
net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in any net namespace because these changes are leaked into all other net namespaces. This is related to the NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls.
Remediation
Install update from vendor's website.