SB2018051003 - SUSE Linux update for the Linux Kernel
Published: May 10, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 9 secuirty vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2017-18257)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists in get_data_block function of the fs/f2fs/data.c library due to improper validation of user-supplied input. A local attacker can run a specially crafted program, designed to send malicious requests to the Linux Kernel and cause the system to stop responding.
2) Improper input validation (CVE-ID: CVE-2018-10087)
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the kernel_wait4 function in kernel/exit.c due to improper validation of the INT_MIN parameter. A local attacker can trigger an error condition and cause the service to crash.
3) Improper input validation (CVE-ID: CVE-2018-10124)
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the kill_something_info function in kernel/signal.c due to improper validation of input. A local attacker can run a program designed to send malicious requests and cause the service to crash.
4) Improper check or handling of exceptional conditions (CVE-ID: CVE-2018-1087)
The vulnerability allows an adjacent attacker to cause DoS condition or gain elevated privileges on the target system.The weakness exists in the Linux kernel KVM hypervisor due to improper handling of debug exceptions delivered after a stack switch operation via mov SS or pop SS instructions. During the stack switch operation, the exceptions are deferred. An adjacent attacker can cause the service to crash or gain root privileges.
5) Memory corruption (CVE-ID: CVE-2018-7740)
The vulnerability allows a local attacker to cause DoS condition no the target system.The weakness exists in the resv_map_release function due to boundary error when handling user-supplied input. A local attacker can execute an application that submits malicious input, trigger memory corruption and cause the system to crash.
6) NULL pointer dereference (CVE-ID: CVE-2018-8043)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists in the unimac_mdio_probe function in drivers/net/phy/mdio-bcm-unimac.c due to improper validation of certain resource availability. A local attacker can trigger NULL pointer dereference and cause the service to crash.
7) Integer overflow (CVE-ID: CVE-2018-8781)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The weakness exists in the udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c due to integer overflow. A local attacker can gain full read and write permissions on kernel physical pages and execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
8) Privilege escalation (CVE-ID: CVE-2018-8822)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The weakness exists in the ncp_read_kernel function due to incorrect buffer length handling. A local attacker can submit specially crafted data from a malicious NCPFS server, trigger memory corruption and execute arbitrary code with root privileges.
9) Privilege escalation (CVE-ID: CVE-2018-8897)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The vulnerability exists due to improper implementation of Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) on multiple system kernels, which results in an unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS. A local user can execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.