7.1

CVE-2018-1095

Exploit
The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version <= 4.15.15
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.46% 0.701
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvd@nist.gov 7.1 8.6 6.9
AV:N/AC:M/Au:N/C:N/I:N/A:C
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://access.redhat.com/errata/RHSA-2018:2948
https://usn.ubuntu.com/3695-1/
https://usn.ubuntu.com/3695-2/
http://openwall.com/lists/oss-security/2018/03/29/1
Mailing List
https://bugzilla.kernel.org/show_bug.cgi?id=199185
Exploit
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1560793
Issue Tracking
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401
Patch