CVE-2023-3603

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2023-3603	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2221791	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:libssh:libssh:-:*:*:*:*:*:*:*

History

01 Aug 2023, 14:44

Type	Values Removed	Values Added
References	~~(MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2221791 -~~	(MISC) https://bugzilla.redhat.com/show_bug.cgi?id=2221791 - Issue Tracking, Third Party Advisory
References	~~(MISC) https://access.redhat.com/security/cve/CVE-2023-3603 -~~	(MISC) https://access.redhat.com/security/cve/CVE-2023-3603 - Third Party Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
CWE		CWE-770
First Time		Libssh Libssh libssh
CPE		cpe:2.3:a:libssh:libssh:-:::::::*

21 Jul 2023, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-07-21 20:15

Updated : 2023-12-10 15:14

NVD link : CVE-2023-3603

Mitre link : CVE-2023-3603

CVE.ORG link : CVE-2023-3603

JSON object : View

Products Affected

libssh

libssh

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

CWE-476

NULL Pointer Dereference

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