CVE & CISA-KEV Catalog

CVE-2018-1123

LOWEPSS 95th pctl
3.9
CVSS v3
NVD

Description

procps-ng before version 3.3.15 is vulnerable to a denial of service in ps via mmap buffer overflow. Inbuilt protection in ps maps a guard page at the end of the overflowed buffer, ensuring that the impact of this flaw is limited to a crash (temporary denial of service).

CWE-122Heap-based Buffer OverflowCWE-119Buffer Overflow

How to fix

Remediation Available
procpsDebian
Fixed in:2:3.3.15-1CVE-2018-1123
Fixed in:2:3.3.15-1CVE-2018-1123
Fixed in:2:3.3.15-1CVE-2018-1123
Fixed in:2:3.3.15-1CVE-2018-1123
libprocps3Ubuntu
Fixed in:1:3.3.9-1ubuntu2.3USN-3658-1
libprocps4Ubuntu
Fixed in:2:3.3.10-4ubuntu2.4USN-3658-1
libprocps6Ubuntu
Fixed in:2:3.3.12-3ubuntu1.1USN-3658-1
procpsUbuntu
Fixed in:1:3.3.9-1ubuntu2.3USN-3658-1
Fixed in:2:3.3.10-4ubuntu2.4USN-3658-1
Fixed in:2:3.3.12-3ubuntu1.1USN-3658-1

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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 VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityLow
AvailabilityLow

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

Exploit Intelligence

9.08%probability of exploitation in 30 days
95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

Exploit1

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2015-3113Critical9.8100%KEVFix
CVE-2024-26256High7.888%-Fix
CVE-2020-25687Medium5.987%-Fix
CVE-2009-3459High8.887%KEVFix
CVE-2021-21017High8.886%KEV-
CVE-2020-25683Medium5.986%-Fix

Common questions

How do I fix CVE-2018-1123?

Published advisories record a fix for 5 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-1123 being actively exploited?

Not that we know of. CVE-2018-1123 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 9.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 95% of all scored CVEs.

How severe is CVE-2018-1123?

CVE-2018-1123 has a CVSS v3 base score of 3.9, rated low. 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-2018-1123 affect?

Published advisories record a fix for procps (Debian), libprocps3 (Ubuntu), libprocps4 (Ubuntu), libprocps6 (Ubuntu), and 1 more. 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.