CVE-2017-13728: invisible-island ncurses Loop with Unreachable Exit Condition
Vulnerability summary
CVE-2017-13728 is a high (CVSS 7.5) Loop with Unreachable Exit Condition vulnerability in invisible-island ncurses. EPSS estimates a 3.90% chance of exploitation in the next 30 days, higher than 90.2% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 29-08-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
There is an infinite loop in the next_char function in comp_scan.c in ncurses 6.0, related to libtic. A crafted input will lead to a remote denial of service attack.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.90%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.90% on 05-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugzilla.redhat.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- ncurses< 6.0_p20170701-r0 | < 6.0_p20170930-r0
Debian1 product
- ncurses< 6.0+20170827-1
Invisible-island1 product
- ncurses6.0
Ubuntu1 product
- ncurses< 5.9+20140118-1ubuntu1+esm1 | < 6.0+20160213-1ubuntu1+esm1
4 vendors · 4 products
References
9 links- bugzilla.redhat.com/show_bug.cgi?id=1484274X Refsource MISCExploitIssue TrackingThird Party AdvisoryVDB Entry
