CVE-2022-4603

Utility crash via unchecked packet-buffer index

Published Dec 18, 2022 · Updated Aug 3, 2024

Out-of-bounds write in PPP pppdump before 2.5.0 allows attackers to crash the utility via a crafted packet-dump file. The dumpppp parser stores decoded bytes at pkt->buf[pkt->cnt++] without first checking the fixed buffer's bounds. A user must explicitly run the non-setuid pppdump utility on the input; it is never invoked automatically, and Ubuntu disputes any security impact.

CVSS severity6.5
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in PPP pppdump before 2.5.0 allows attackers to crash the utility via a crafted packet-dump file. The dumpppp parser stores decoded bytes at pkt->buf[pkt->cnt++] without first checking the fixed buffer's bounds. A user must explicitly run the non-setuid pppdump utility on the input; it is never invoked automatically, and Ubuntu disputes any security impact.

The record

CVE
CVE-2022-4603
Published
Dec 18, 2022
Updated
Aug 3, 2024
Vendor
PPP Project
Product
PPP
Classifications
CWE-119
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

PPP Project · PPPversion=n/a

Published CVSS scores

4.3VulDB CNACVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3SUSECVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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