Juniper Junos Multiple OpenSSL Vulnerabilities (JSA10679) (FREAK)

Medium Nessus Plugin ID 82912

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VPR Score: 4.5

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version number, the remote Juniper Junos device is affected by the following vulnerabilities related to OpenSSL :

- A NULL pointer dereference flaw exists when the SSLv3 option isn't enabled and an SSLv3 ClientHello is received. This allows a remote attacker, using an unexpected handshake, to crash the daemon, resulting in a denial of service. (CVE-2014-3569)

- The BIGNUM squaring (BN_sqr) implementation does not properly calculate the square of a BIGNUM value. This allows remote attackers to defeat cryptographic protection mechanisms. (CVE-2014-3570)

- A flaw exists with ECDH handshakes when using an ECDSA certificate without a ServerKeyExchange message. This allows a remote attacker to trigger a loss of forward secrecy from the ciphersuite. (CVE-2014-3572)

- A flaw exists when accepting non-DER variations of certificate signature algorithms and signature encodings due to a lack of enforcement of matches between signed and unsigned portions. A remote attacker, by including crafted data within a certificate's unsigned portion, can bypass fingerprint-based certificate-blacklist protection mechanisms. (CVE-2014-8275)

- A security feature bypass vulnerability, known as FREAK (Factoring attack on RSA-EXPORT Keys), exists due to the support of weak EXPORT_RSA cipher suites with keys less than or equal to 512 bits. A man-in-the-middle attacker may be able to downgrade the SSL/TLS connection to use EXPORT_RSA cipher suites which can be factored in a short amount of time, allowing the attacker to intercept and decrypt the traffic. (CVE-2015-0204)

- A flaw exists when accepting DH certificates for client authentication without the CertificateVerify message.
This allows a remote attacker to authenticate to the service without a private key. (CVE-2015-0205)

Note that these issues only affects devices with J-Web or the SSL service for JUNOScript enabled.

Solution

Apply the relevant Junos software release or workaround referenced in Juniper advisory JSA10679.

See Also

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10679

https://www.openssl.org/news/secadv/20150108.txt

https://www.smacktls.com/#freak

Plugin Details

Severity: Medium

ID: 82912

File Name: juniper_jsa10679.nasl

Version: 1.12

Type: combined

Published: 2015/04/21

Updated: 2018/07/12

Dependencies: 55932

Risk Information

Risk Factor: Medium

VPR Score: 4.5

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/o:juniper:junos, cpe:/a:openssl:openssl

Required KB Items: Host/Juniper/JUNOS/Version

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/04/08

Vulnerability Publication Date: 2014/10/16

Reference Information

CVE: CVE-2014-3569, CVE-2014-3570, CVE-2014-3572, CVE-2014-8275, CVE-2015-0204, CVE-2015-0205

BID: 71934, 71935, 71936, 71939, 71941, 71942

JSA: JSA10679

CERT: 243585