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CVE-2017-13728

26
FAUCET Score

CVE-2017-13728 describes an infinite loop vulnerability in the next_char function within comp_scan.c of ncurses 6.0, specifically impacting the libtic component. This flaw allows a remote attacker to trigger a denial of service by providing crafted input. Rated as High severity (CVSS 7.5), it requires no user interaction and has a low attack complexity, leading to a complete loss of availability. There is currently 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
6.0CPE matchmatch criteria
cpe:2.3:a:invisible-island:ncurses:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.90%
Probability of exploitation in next 30 days
EPSS Percentile
89.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0390 is in the 81st percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: ncurses
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: ncurses
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ncurses

Vendor Advisories (1)

redhatCVE-2017-13728Low

ncurses: Infinite loop in the next_char function

Aug 23, 2017

References

bugzilla.redhat.com / show_bug.cgi
ExploitIssue TrackingThird Party AdvisoryVDB Entry
lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
security.gentoo.org / glsa/201804-13