CVE-2018-10195

Local memory disclosure and crash via length wraparound

Published Jun 2, 2021 · Updated Aug 5, 2024

Integer wraparound in lrzsz before 0.12.21~rc allows local users to disclose process data or crash sz through a crafted transfer. The zsdata function subtracts from a zero-length size_t, wrapping its remaining-length check and transmitting bytes beyond the intended buffer. A user able to run sz and control the transfer can expose sender-process data to the receiving side or terminate the sender; no integrity impact is reported.

CVSS severity7.1
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer wraparound in lrzsz before 0.12.21~rc allows local users to disclose process data or crash sz through a crafted transfer. The zsdata function subtracts from a zero-length size_t, wrapping its remaining-length check and transmitting bytes beyond the intended buffer. A user able to run sz and control the transfer can expose sender-process data to the receiving side or terminate the sender; no integrity impact is reported.

The record

CVE
CVE-2018-10195
Published
Jun 2, 2021
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1048
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1Ubuntu SecurityCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.6NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1048Exfiltration Over Alternative Protocol

Public exploit references

No public exploit references are available in this record.

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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