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AUSCERT External Security Bulletin Redistribution
Junos OS: Multiple vulnerabilities in stunnel
12 April 2018
AusCERT Security Bulletin Summary
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Access Privileged Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2015-3644 CVE-2014-0016 CVE-2013-1762
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2018-04 Security Bulletin: Junos OS: Multiple vulnerabilities in stunnel
CVSS Score:7.3 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Risk Level: Medium
All products and platforms running Junos OS
Multiple vulnerabilities in stunnel software included with Junos OS have been
resolved by upgrading stunnel to 5.38.
Stunnel is used for providing SSL/TLS protection to Junos XML protocol server
(xnm-ssl). These issues only affect devices where xnm-ssl is configured.
Affected releases are Juniper Networks Junos OS:
12.1X46 prior to 12.1X46-D76;
12.3X48 versions prior to 12.3X48-D50;
15.1 versions prior to 15.1R7;
15.1X49 versions prior to 15.1X49-D100;
16.1 versions prior to 16.1R5;
16.2 versions prior to 16.2R2;
17.1 versions prior to 17.1R2;
Important vulnerabilities resolved in stunnel 5.38 include:
CVE CVSS Summary
stunnel before 5.00, when using fork threading, does
4.3 (AV:N/ not properly update the state of the OpenSSL
AC:M/Au:N/ pseudo-random number generator (PRNG), which causes
CVE-2014-0016 C:P/I:N/ subsequent children with the same process ID to use
A:N) the same entropy pool and allows remote attackers to
obtain private keys for EC (ECDSA) or DSA
6.8 (AV:N/ The OCSP functionality in stunnel before 4.24 does not
CVE-2008-2420 AC:M/Au:N/ properly search certificate revocation lists (CRL),
C:P/I:P/ which allows remote attackers to bypass intended
A:P) access restrictions by using revoked certificates.
Stunnel software included with Junos OS 12.1X46, 12.3X48 has been upgraded from
4.04 to 5.38 in 12.1X46-D76, 12.3X48-D50 and subsequent releases.
Stunnel software in Junos 15.1 and above has been upgraded from 5.01 to 5.38.
This resolves CVE-2013-1762, CVE-2014-0016 and CVE-2015-3644.
The following software releases have been updated to resolve this specific
issue: 12.1X46-D76, 12.3X48-D50, 15.1R7, 15.1X49-D100, 16.1R5, 16.2R2, 17.1R2,
17.2R1, and all subsequent releases.
Upgraded stunnel software includes the fixes for CVE-2015-3644, CVE-2013-1762,
CVE-2008-2400, however these issues do not affect or impact Junos OS.
These issues are being tracked as PR 1226804 and 31143 which are visible on the
Customer Support website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of
Engineering (EOE) or End of Life (EOL).
Limit access to the administrative interfaces such as xnm-ssl on the device to
only trusted networks and hosts.
Disable xnm-ssl if Junos XML access to the device is not required or being used
Software Releases, patches and updates are available at
2018-04-11: Initial Publication.
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