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CVE-2018-11504

19
FAUCET Score

CVE-2018-11504 is a heap-based buffer over-read vulnerability in the islist function of libmarkdown.a in DISCOUNT 2.2.3a, affecting Debian Linux and Discount Project products. This medium-severity vulnerability (CVSS 5.5) can be triggered by a remote attacker via a crafted file, leading to a denial of service. While user interaction is required, the attack complexity is low. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2.2.3CPE matchmatch criteria
cpe:2.3:a:discount_project:discount:2.2.3:a:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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
1.51%
Probability of exploitation in next 30 days
EPSS Percentile
71.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0151 is in the 82nd percentile among its peer group of 5,758 CVEs.

Social Chatter

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

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: discount

Vendor Advisories (1)

redhatCVE-2018-11504Low

discount: Heap-based buffer-overflow in markdown.c:islist() allows for denial of service

May 26, 2018

References

github.com / Orc/discount/issues/189
Issue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2018/09/msg00009.html
Mailing ListThird Party Advisory
debian.org / security/2018/dsa-4293
Third Party Advisory