CVE-2018-15361

Q: How do I fix CVE-2018-15361?

Upgrade ultravnc to 1.2.2.3 or later.

Q: Is CVE-2018-15361 being actively exploited?

Not that we know of. CVE-2018-15361 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 85% of all scored CVEs.

Q: How severe is CVE-2018-15361?

CVE-2018-15361 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2018-15361 affect?

Published advisories record a fix for ultravnc (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICALEPSS 85th pctl

9.8

CVSS v3

NVD

Description

UltraVNC revision 1198 has a buffer underflow vulnerability in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1199.

CWE-124 CWE-787Out-of-bounds Write

How to fix

Remediation Available

ultravncNVD

Affected:< 1.2.2.3Fixed in:1.2.2.3CVE-2018-15361derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.88%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Third-Party Advisory1

ics-cert.kaspersky.com

Other references2

Related Vulnerabilities

Other CWE-124 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-2426	High	8.8	87%	KEV	-
CVE-2023-25610	Critical	9.8	18%	-	Fix
CVE-2018-5388	Medium	6.5	4.0%	-	Fix
CVE-2021-36064	High	7.8	2.7%	-	Fix
CVE-2023-48230	Medium	5.9	1.9%	-	Fix
CVE-2021-38575	High	8.1	1.9%	-	Fix

Common questions

How do I fix CVE-2018-15361?

Upgrade ultravnc to 1.2.2.3 or later.

Is CVE-2018-15361 being actively exploited?

Not that we know of. CVE-2018-15361 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 85% of all scored CVEs.

How severe is CVE-2018-15361?

CVE-2018-15361 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-15361 affect?

Published advisories record a fix for ultravnc (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.