SB2019050610 - Amazon Linux AMI update for kernel
Published: May 6, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Memory leak (CVE-ID: CVE-2019-3459)
The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The vulnerability exists due heap address infoleak in use of l2cap_get_conf_opt. A local attacker can trigger memory leak and access important data.
2) Memory leak (CVE-ID: CVE-2019-3460)
The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The vulnerability exists due heap address infoleak in multiple locations including function l2cap_parse_conf_rsp. A local attacker can trigger memory leak and access important data.
3) Information disclosure (CVE-ID: CVE-2019-7308)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to out-of-bounds speculation on pointer arithmetic in various cases in kernel/bpf/verifier.c, including cases of different branches with different state or limits to sanitize. A remote attacker can gain unauthorized access to sensitive information on the system.
Remediation
Install update from vendor's website.