69565 : OpenSSL SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG Session Resume Ciphersuite Downgrade Weakness
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
24	2820	over 2 years ago	10 days ago	30 times	100%

Timeline

Disclosure Date
2010-12-03

Description

OpenSSL contains a flaw related to the SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG workaround in the SSL/TLS server code. The issue is triggered when a remote attacker downgrades the cached ciphersuite, leading to the client using a weaker ciphersuite.

Classification

Location: Remote / Network Access
Attack Type: Cryptographic
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified, Coordinated Disclosure
OSVDB: Security Software

Solution

Upgrade to version 0.9.8q or 1.0.0c or higher, as they have been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

OpenBSD	OpenSSL	0.9.1x
		0.9.2x
		0.9.3x
		0.9.4x
		0.9.5x
		0.9.6x
		0.9.7x
		0.9.8
		0.9.8a
		0.9.8b
		0.9.8c
		0.9.8d
		0.9.8e
		0.9.8f
		0.9.8g
		0.9.8h
		0.9.8i
		0.9.8j
		0.9.8k
		0.9.8l
		0.9.8
		0.9.8n
		0.9.8o
		0.9.8p
		1.0.0
		1.0.0a
		1.0.0b

References

Tools & Filters

	51058 51892 53637 53640
	5720

Credit

Martin Rex

CVSSv2 Score

CVSSv2 Base Score = 4.3
Source: nvd.nist.gov | Generated: 2010-12-07 | Disagree?

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