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CVE-2018-17942

28
FAUCET Score

CVE-2018-17942 is a heap-based buffer overflow vulnerability in the convert_to_decimal function of Gnulib, affecting versions prior to 2018-09-23. This flaw arises during %f processing due to insufficient memory allocation for a null terminator. With a CVSS score of 8.8 (High), it presents a significant risk, allowing unauthenticated attackers to achieve high impact on confidentiality, integrity, and availability through network-based attacks requiring user interaction. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2018-09-23CPE matchmatch criteria
cpe:2.3:a:gnu:gnulib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.51%
Probability of exploitation in next 30 days
EPSS Percentile
83.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0251 is in the 82nd percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Storage 3Fixed in: nagios-plugins

Vendor Advisories (1)

redhatCVE-2018-17942Low

gnulib: heap-based buffer overflow in convert_to_decimal function in vasnprintf.c

Sep 19, 2018

References

github.com / coreutils/gnulib/commit/278b4175c9d7dd47c1a3071554aac02add3b3c35
PatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/A5UQRNQE6XHMD5UYYHAU3VQWAYHIPMQS
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/TMGHTVYH3KAFN34QXNSGEQDSTV7MCOQW
lists.gnu.org / archive/html/bug-gnulib/2018-09/msg00107.html
ExploitMailing ListVendor Advisory
savannah.gnu.org / bugs
ExploitVendor Advisory