vulnwire
6.4med

CVE-2017-7549

instack-undercloud vulnerable to symlink attack on tmp files

Also known as GHSA-53wm-97p6-582f, PYSEC-2017-152, PYSEC-2026-645

Published 9 y ago · modified 4 mo ago · JSON

CVSS
6.4
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
0.4%
percentile 29%
Public exploits
0
none known

A flaw was found in instack-undercloud 7.2.0 as packaged in Red Hat OpenStack Platform Pike, 6.1.0 as packaged in Red Hat OpenStack Platform Oacta, 5.3.0 as packaged in Red Hat OpenStack Newton, where pre-install and security policy scripts used insecure temporary files. A local user could exploit this flaw to conduct a symbolic-link attack, allowing them to overwrite the contents of arbitrary files.

Exploit prediction (EPSS)

0.35% probability of exploitation in the next 30 days, higher than 29% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.06.4CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
NVD2.03.3AV:L/AC:M/Au:N/C:P/I:P/A:N
OSV3.06.4CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
OSV3.06.4CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
GitHub3.06.4CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N

Affected packages

EcosystemPackageAffectedFixed in
pypiinstack-undercloud
<=7.2.0
no fix listed
pypiinstack
<=7.2.0
<=6.1.0
<=5.3.0
no fix listed

Affected products

  • Red Hat, Inc. instack-undercloud

Classification

Weakness
  • CWE-377 DEPRECATED: Insecure Temporary File
  • CWE-59 Improper Link Resolution Before File Access

References

  • access.redhat.com /errata/RHSA-2017:2726 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • securityfocus.com /bid/100407 · vdb-entry, x_refsource_BID, x_transferred
  • access.redhat.com /errata/RHSA-2017:2649 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2017:2687 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2017:2557 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • access.redhat.com /errata/RHSA-2017:2693 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • bugzilla.redhat.com /show_bug.cgi?id=1477403 · x_refsource_CONFIRM, x_transferred
  • nvd.nist.gov /vuln/detail/CVE-2017-7549 · advisory
  • access.redhat.com /security/cve/CVE-2017-7549 · web
  • github.com /pypa/advisory-database/tree/main/vulns/instack/PYSEC-2017-152.yaml · web
  • opendev.org /openstack/instack-undercloud · web
  • web.archive.org /web/20170907040549/http://www.securityfocus.com/bid/100407 · web
  • pypi.org /project/instack-undercloud · package
  • github.com /advisories/GHSA-53wm-97p6-582f · advisory

Sources

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