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 vulnerabilities.
1) Memory leak (CVE-ID: CVE-2019-3459)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
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)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
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)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
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.