SB2019020623 - OpenSUSE Linux update for the Linux Kernel
Published: February 6, 2019 Updated: February 6, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 10 secuirty vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2018-1120)
The vulnerability allows a local user to cause DoS condition on the target system.The weakness exists due to insufficient validation of user-supplied input. A local user can block any read() access to /proc/PID/cmdline by mmap()ing a FUSE file (Filesystem in Userspace) onto this process's command-line arguments, block pgrep, pidof, pkill, ps, and w, either forever (a denial of service), or for some controlled time (a synchronization tool for exploiting other vulnerabilities).
2) Security restrictions bypass (CVE-ID: CVE-2018-16862)
The vulnerability allows a local attacker to bypass security restrictions on the target system.
The vulnerability exists due to an error when the cleancache subsystem clears an inode after the final file truncation (removal). A local attacker can supply new file created with the same inode that may contain leftover pages from cleancache and bypass security restrictions to conduct further attacks.
3) Use-after-free error (CVE-ID: CVE-2018-16884)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to bc_svc_process() use wrong back-channel id when NFS41+ shares mounted in different network namespaces at the same time. A remote attacker can use a malicious container to trigger use-after-free error and cause a system panic.
4) Null pointer dereference (CVE-ID: CVE-2018-19407)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the vcpu_scan_ioapic function, as defined in the arch/x86/kvm/x86.c source code file due to the failure of the I/O Advanced Programmable Interrupt Controller (I/O APIC) to initialize. A local attacker can access the system and execute an application that submits malicious system calls, trigger a NULL pointer dereference, which could result in a DoS condition.
5) Use-after-free error (CVE-ID: CVE-2018-19824)
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists in the Advanced Linux Sound Architecture (ALSA) driver due to use-after-free error in the usb_audio_probefunction, as defined in the sound/usb/card.c source code file. A local attacker can supply a malicious USB sound device with no interfaces, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
6) Out-of-bounds read (CVE-ID: CVE-2018-19985)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when the function "hso_get_config_data" in "drivers/net/usb/hso.c" reads "if_num" from the USB device (as a u8) and uses it to index a small array. An authenticated local user with physical access to the system can use a malicious USB, trigger out-of-bounds read error and read contents of memory on the system.
7) Memory corruption (CVE-ID: CVE-2018-20169)
The vulnerability allows a local attacker to cause DoS condition or execute arbitrary code on the target system.
The vulnerability exists in the USB subsystem due to improper checks on the minimum and maximum size of data allowed when reading an extra descriptor by the USB subsystem of the affected software, related to the __usb_get_extra_descriptor in the drivers/usb/core/usb.c source code file. A local attacker can insert a USB device designed to submit malicious input, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
8) Type Confusion (CVE-ID: CVE-2018-9568)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a type confusion error in the sk_clone_lock() function in sock.c. A local user can run a specially crafted application to trigger memory corruption and execute arbitrary code on the target system with elevated privileges.
9) 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.
10) 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.
Remediation
Install update from vendor's website.