SB2020010332 - Juniper Networks Steel-Belted Radius (SBR) Carrier update for OpenSSL

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2018-0732)

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to improper handling of large prime values by the affected software during key agreement operations in a Transport Layer Security (TLS) handshake using an Ephemeral Diffie-Hellman (DHE) based cipher suite. A remote attacker can send a large prime value from a malicious OpenSSL server to a targeted OpenSSL client and cause the client to stop responding while generating a key for the prime value.

2) Information disclosure (CVE-ID: CVE-2018-0737)

The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.

The weakness exists in the RSA key generation algorithm's BN_mod_inverse() and BN_mod_exp_mont() functions due to a cache timing side channel attack. A local attacker can recover the private key.

3) Resource exhaustion (CVE-ID: CVE-2018-0739)

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to excessive stack memory consumption. A remote attacker can cause the service to crash.

4) Information disclosure (CVE-ID: CVE-2016-7055)

The vulnerability allows a remote attacker to decrypt certain data.

The vulnerability exists in OpenSSL implementation due to propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. A remote attacker can launch attacks against RSA, DSA and DH private keys and decrypt information, passed over encrypted channels. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation.

Successful exploitation of the vulnerability may allow an attacker in certain conditions to launch attacks against OpenSSL clients.

5) Out-of-bounds read (CVE-ID: CVE-2017-3735)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to one-byte out-of-bounds read when parsing an IPAddressFamily extension in an X.509 certificate. A remote attacker can disguise text display of the certificate.

Remediation

Install update from vendor's website.

References

• https://supportportal.juniper.net/s/article/2020-01-Security-Bulletin-SBR-Carrier-Multiple-Vulnerabilities-in-OpenSSL