CVE-2018-20623

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.82% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 77.2% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2018-12-31 19:00Z7 YR AGO

Last updated

2025-05-06 18:03Z1 YR AGO

Reserved

2018-12-31

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.1

Document digest

930397319b760328244d1cf8b7baf78bb92141ba8a2d64dbc51c8dae792608f4

• www.securityfocus.com106370http://www.securityfocus.com/bid/106370vdb-entryx_refsource_BID
• sourceware.orghttps://sourceware.org/bugzilla/show_bug.cgi?id=24049x_refsource_MISC
• support.f5.comhttps://support.f5.com/csp/article/K38336243x_refsource_CONFIRM
• lists.opensuse.orgopenSUSE-SU-2019:2415http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00072.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2019:2432http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00008.htmlvendor-advisoryx_refsource_SUSE
• usn.ubuntu.comUSN-4336-1https://usn.ubuntu.com/4336-1/vendor-advisoryx_refsource_UBUNTU