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CVE-2017-18184

16
FAUCET Score

CVE-2017-18184 describes a stack-based out-of-bounds read vulnerability in the iterate_rc4 function within QPDF_encryption.cc, affecting QPDF versions prior to 7.0.0. This medium-severity vulnerability (CVSS 5.5) has a local attack vector requiring user interaction, potentially leading to a denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.0.0CPE matchmatch criteria
cpe:2.3:a:qpdf_project:qpdf:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 54th percentile among its peer group of 5,765 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: qpdf

Vendor Advisories (1)

redhatCVE-2017-18184Low

qpdf: out-of-bounds read in iterate_rc4 in QPDF_encryption.cc

Aug 23, 2017

References

github.com / qpdf/qpdf/commit/dea704f0ab7f625e1e7b3f9a1110b45b63157317
PatchThird Party Advisory
github.com / qpdf/qpdf/issues/147
Issue TrackingThird Party Advisory
usn.ubuntu.com / 3638-1