CVE-2020-19186Public exploitNetwork attack vector

Process crash via unchecked hash-table index

Published Aug 22, 2023 · Updated Nov 27, 2024

Global buffer over-read in ncurses 6.1 allows remote attackers to crash infotocap when a crafted terminfo file is converted. _nc_find_entry uses the capability-name hash result directly as a table_data index without first verifying that it lies within the table, causing a two-byte read outside the global hash data. A user or automated workflow must invoke infotocap on the supplied file; the demonstrated consequence is process termination under AddressSanitizer.

CVSS severity6.5
Medium
EPSS probability1.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Global buffer over-read in ncurses 6.1 allows remote attackers to crash infotocap when a crafted terminfo file is converted. _nc_find_entry uses the capability-name hash result directly as a table_data index without first verifying that it lies within the table, causing a two-byte read outside the global hash data. A user or automated workflow must invoke infotocap on the supplied file; the demonstrated consequence is process termination under AddressSanitizer.

The record

CVE
CVE-2020-19186
Published
Aug 22, 2023
Updated
Nov 27, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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