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CVE-2023-3603

UNKNOWN
Published 2023-07-21T19:09:44.083Z
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CVSS Score

V3.1
3.1
/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.318
Higher than 31.8% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
LOW

Description

A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user's sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users.

Given this code is not in any released versions, no security releases have been issued.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Red Hat

Red Hat Enterprise Linux 7

Red Hat

Red Hat Enterprise Linux 8

Red Hat

Red Hat Enterprise Linux 9

Fedora

Extra Packages for Enterprise Linux 7

Fedora

Fedora

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-2c4f-vgwr-82q6

Advisory Details

A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was not being checked for failure. This will likely crash the authenticated user's sftp server connection (if implemented as forking as recommended). For thread-based servers, this might also cause DoS for legitimate users. Given this code is not in any released versions, no security releases have been issued.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-3603
WEB https://access.redhat.com/security/cve/CVE-2023-3603
WEB https://bugzilla.redhat.com/show_bug.cgi?id=2221791

Advisory provided by GitHub Security Advisory Database. Published: July 21, 2023, Modified: April 4, 2024

References

https://access.redhat.com/security/cve/CVE-2023-3603
https://bugzilla.redhat.com/show_bug.cgi?id=2221791
Published: 2023-07-21T19:09:44.083Z
Last Modified: 2024-09-26T20:04:43.251Z
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