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NVD Vulnerability Details :

CVE-2009-0653

Modified

Source-cve@mitre.org

Published At-20 Feb, 2009 | 19:30

Updated At-23 Apr, 2026 | 00:35

OpenSSL, probably 0.9.6, does not verify the Basic Constraints for an intermediate CA-signed certificate, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack, a related issue to CVE-2002-0970.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Primary	2.0	7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P

Type: Primary

Version: 2.0

Base score: 7.5

Base severity: HIGH

Vector:

AV:N/AC:L/Au:N/C:P/I:P/A:P

CPE Matches

OpenSSL

>>openssl>>0.9.6

cpe:2.3:a:openssl:openssl:0.9.6:*:*:*:*:*:*:*

Weaknesses

CWE ID	Type	Source
CWE-287	Primary	nvd@nist.gov

CWE ID: CWE-287

Type: Primary

Source: nvd@nist.gov

Vendor Statements

Organization : Red Hat

Last Modified : 2009-03-02T00:00:00

Not vulnerable. This issue was addressed in upstream OpenSSL prior to 0.9.6 and therefore does not affect the versions of OpenSSL as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5.

References

Hyperlink	Source	Resource
http://www.blackhat.com/html/bh-dc-09/bh-dc-09-speakers.html#Marlinspike	cve@mitre.org	N/A
https://www.blackhat.com/presentations/bh-dc-09/Marlinspike/BlackHat-DC-09-Marlinspike-Defeating-SSL.pdf	cve@mitre.org	Exploit
http://www.blackhat.com/html/bh-dc-09/bh-dc-09-speakers.html#Marlinspike	af854a3a-2127-422b-91ae-364da2661108	N/A
https://www.blackhat.com/presentations/bh-dc-09/Marlinspike/BlackHat-DC-09-Marlinspike-Defeating-SSL.pdf	af854a3a-2127-422b-91ae-364da2661108	Exploit