Denial of Service Vulnerability in Linux Kernel for ext4 File System
CVE-2018-1095

5.5MEDIUM

Key Information:

Vendor

Linux
Status
Linux Kernel Through Version 4.15
Vendor
CVE Published:
2 April 2018

What is CVE-2018-1095?

The ext4_xattr_check_entries function in the Linux kernel, specifically within fs/ext4/xattr.c, has a flaw in its validation process for extended attributes (xattr) sizes. This vulnerability can lead to the misinterpretation of a size as an error code. Consequently, attackers can exploit this issue using specially crafted ext4 images to trigger a denial of service, resulting in a NULL pointer dereference that crashes the system.

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Affected Version(s)

Linux kernel through version 4.15 Linux kernel through version 4.15

References

https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext...
x_refsource_MISC
http://openwall.com/lists/oss-security/2018/03/29/1
x_refsource_MISC
https://usn.ubuntu.com/3695-1/
vendor-advisoryx_refsource_UBUNTU

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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