SB2019030105 - OpenSUSE Linux update for the Linux Kernel

Description

This security bulletin contains information about 5 vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2018-5391)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to an error when handling reassembly of fragmented IPv4 and IPv6 packets. A remote attacker can send specially crafted packets, trigger time and calculation expensive fragment reassembly algorithms and cause the service to crash.

2) 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.

3) 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.

4) Use-after-free (CVE-ID: CVE-2019-7221)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows an adjacent attacker to cause DoS condition or execute arbitrary code.

The weakness exists due to exists due to use-after-free error when using emulated vmx preemption timer. An adjacent attacker can cause the service to crash or execute arbitrary code with elevated privileges.

5) Memory leak (CVE-ID: CVE-2019-7222)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear

The vulnerability allows an adjacent attacker to obtain potentially sensitive information.

The weakness exists due to exists due to memory leak in kvm_inject_page_fault. An adjacent attacker can gain access to important data and conduct further attacks.

Remediation

Install update from vendor's website.

References

• https://lists.opensuse.org/opensuse-security-announce/2019-03/msg00000.html