Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2018-14651

Improper Link Resolution Before File Access ('Link Following')

Published: Oct 31, 2018 | Modified: Nov 21, 2024
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
6.5 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.8 IMPORTANT
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2018-14651
CWEhttps://cwe.mitre.org/data/definitions/59.html

It was found that the fix for CVE-2018-10927, CVE-2018-10928, CVE-2018-10929, CVE-2018-10930, and CVE-2018-10926 was incomplete. A remote, authenticated attacker could use one of these flaws to execute arbitrary code, create arbitrary files, or cause denial of service on glusterfs server nodes via symlinks to relative paths.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

NameVendorStart VersionEnd Version
Debian_linuxDebian8.0 (including)8.0 (including)
Native Client for RHEL 6 for Red Hat StorageRedHatglusterfs-0:3.12.2-25.el6*
Native Client for RHEL 7 for Red Hat StorageRedHatglusterfs-0:3.12.2-25.el7*
Red Hat Gluster Storage 3.4 for RHEL 6RedHatglusterfs-0:3.12.2-25.el6rhs*
Red Hat Gluster Storage 3.4 for RHEL 6RedHatredhat-storage-server-0:3.4.1.0-1.el6rhs*
Red Hat Gluster Storage 3.4 for RHEL 7RedHatglusterfs-0:3.12.2-25.el7rhgs*
Red Hat Gluster Storage 3.4 for RHEL 7RedHatredhat-storage-server-0:3.4.1.0-1.el7rhgs*
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7RedHatglusterfs-0:3.12.2-25.el7*
GlusterfsUbuntubionic*
GlusterfsUbuntucosmic*
GlusterfsUbuntuesm-apps/bionic*
GlusterfsUbuntuesm-apps/xenial*
GlusterfsUbuntuesm-infra-legacy/trusty*
GlusterfsUbuntutrusty*
GlusterfsUbuntutrusty/esm*
GlusterfsUbuntuxenial*

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References

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