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AUSCERT External Security Bulletin Redistribution
ESB-2020.0095
JSA10990 - 2020-01 Security Bulletin: SBR Carrier: Multiple
Vulnerabilities in OpenSSL
9 January 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Juniper Networks SBR Carrier
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0739 CVE-2018-0737 CVE-2018-0732
CVE-2017-3735 CVE-2016-7055
Reference: ESB-2018.3735
ESB-2018.3639
ESB-2017.1743
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10990
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2020-01 Security Bulletin: SBR Carrier: Multiple Vulnerabilities in OpenSSL
Article ID : JSA10990
Last Updated: 08 Jan 2020
Version : 1.0
Product Affected:
These issues affect SBR Carrier 8.5.0.
Problem:
Multiple vulnerabilities in OpenSSL have been resolved in the Juniper Networks
Steel-Belted Radius (SBR) Carrier AAA (Authentication, Authorization, and
Accounting) server.
These issues affect Juniper Networks SBR Carrier:
o versions prior to 8.4.1R13;
o 8.5.0 versions prior to 8.5.0R4.
Juniper SIRT is not aware of any malicious exploitation of these
vulnerabilities.
These issues were discovered during an external security research.
OpenSSL in SBR Carrier has been upgraded to OpenSSL 1.0.2q which resolved the
following vulnerabilities in OpenSSL:
CVE CVSS Summary
During key agreement in a TLS handshake using a DH(E)
7.5 ( based ciphersuite a malicious server can send a very
CVSS:3.0/ large prime value to the client. This will cause the
AV:N/AC:L/ client to spend an unreasonably long period of time
CVE-2018-0732 PR:N/UI:N/ generating a key for this prime resulting in a hang
S:U/C:N/ until the client has finished. This could be exploited
I:N/A:H ) in a Denial Of Service attack. Fixed in OpenSSL
1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL
1.0.2p-dev (Affected 1.0.2-1.0.2o).
5.9 ( The OpenSSL RSA Key generation algorithm has been
CVSS:3.0/ shown to be vulnerable to a cache timing side channel
AV:N/AC:H/ attack. An attacker with sufficient access to mount
CVE-2018-0737 PR:N/UI:N/ cache timing attacks during the RSA key generation
S:U/C:H/ process could recover the private key. Fixed in
I:N/A:N ) OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in
OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).
Constructed ASN.1 types with a recursive definition
6.5 ( (such as can be found in PKCS7) could eventually
CVSS:3.0/ exceed the stack given malicious input with excessive
AV:N/AC:L/ recursion. This could result in a Denial Of Service
CVE-2018-0739 PR:N/UI:R/ attack. There are no such structures used within SSL/
S:U/C:N/ TLS that come from untrusted sources so this is
I:N/A:H ) considered safe. Fixed in OpenSSL 1.1.0h (Affected
1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected
1.0.2b-1.0.2n).
There is a carry propagating bug in the
Broadwell-specific Montgomery multiplication procedure
in OpenSSL 1.0.2 and 1.1.0 before 1.1.0c that handles
input lengths divisible by, but longer than 256 bits.
Analysis suggests that attacks against RSA, DSA and DH
private keys are impossible. This is because the
subroutine in question is not used in operations with
5.9 ( the private key itself and an input of the attacker's
CVSS:3.0/ direct choice. Otherwise the bug can manifest itself
AV:N/AC:H/ as transient authentication and key negotiation
CVE-2016-7055 PR:N/UI:N/ failures or reproducible erroneous outcome of
S:U/C:N/ public-key operations with specially crafted input.
I:N/A:H ) Among EC algorithms only Brainpool P-512 curves are
affected and one presumably can attack ECDH key
negotiation. Impact was not analyzed in detail,
because pre-requisites for attack are considered
unlikely. Namely multiple clients have to choose the
curve in question and the server has to share the
private key among them, neither of which is default
behaviour. Even then only clients that chose the curve
will be affected.
5.3 ( While parsing an IPAddressFamily extension in an X.509
CVSS:3.0/ certificate, it is possible to do a one-byte overread.
CVE-2017-3735 AV:N/AC:L/ This would result in an incorrect text display of the
PR:N/UI:N/ certificate. This bug has been present since 2006 and
S:U/C:N/ is present in all versions of OpenSSL before 1.0.2m
I:L/A:N ) and 1.1.0g.
Solution:
The following software releases have been updated to resolve these specific
issues: SBR Carrier 8.4.1R13, 8.5.0R4, and all subsequent releases.
These issues are being tracked as 1414678 .
Workaround:
There are no viable workarounds for these issues.
Implementation:
Software release Service Packages are available at http://support.juniper.net
from the "Download Software" links.
Modification History:
2020-01-08: Initial Publication
CVSS Score:
7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
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