SB2018070901 - Multiple vulnerabilities in Linux Kernel

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Main Vulnerability Database SB2018070901

SB2018070901 - Multiple vulnerabilities in Linux Kernel

Published: July 9, 2018 Updated: July 10, 2018

Security Bulletin ID SB2018070901
Severity
Low
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 secuirty vulnerabilities.


1) Divide-by-zero (CVE-ID: CVE-2018-13100)

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

The vulnerability exists due to improper validation of secs_per_zone information in a corrupted Flash-Friendly File System (F2FS) image. A local attacker can mount a specially crafted F2FS image, trigger a divide-by-zero condition in the reset_curseg() function, as defined in the fs/f2fs/super.c source code file and cause the system to crash.


2) Null pointer dereference (CVE-ID: CVE-2018-12928)

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

The vulnerability exists due to boundary error when mounting HFS filesystems. A local attacker can access the system, execute an application that submits malicious input, cause a NULL pointer dereference and cause the system to crash.


3) Buffer over-read (CVE-ID: CVE-2018-13098)

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to an out-of-bounds read in fs/f2fs/inode.c file that occurs for a modified f2fs filesystem image in which FI_EXTRA_ATTR is set in an inode.


4) Buffer over-read (CVE-ID: CVE-2018-13099)

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to an out-of-bounds read in fs/f2fs/inline.c file that occurs for a modified f2fs filesystem image in which an inline inode contains an invalid reserved blkaddr.


5) Security restrictions bypass (CVE-ID: CVE-2018-13405)

The vulnerability allows a local attacker to create arbitrary files on the target system.

The vulnerability exists due to the inode_init_owner function, as defined in the fs/inode.c source code file, allows the creation of arbitrary files in set-group identification (SGID) directories. A local attacker can create arbitrary files with unintended group ownership.


6) Integer overflow (CVE-ID: CVE-2018-13406)

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

The vulnerability exists due to integer overflow in the uvesafb_setcmap function, as defined in the drivers/video/fbdev/uvesafb.c source code file. A local attacker can execute a file or program that submits malicious input, trigger memory corruption and cause the affected software to crash.


Remediation

Install update from vendor's website.

References