ESB-2018.1123 - [Juniper] rpd: Denial of service - Remote/unauthenticated 2018-04-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.1123
          Junos OS: rpd daemon cores due to malformed BGP UPDATE
                          packet (CVE-2018-0020)
                               12 April 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           rpd
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0020  

Original Bulletin: 
   https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10848

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2018-04 Security Bulletin: Junos OS: rpd daemon cores due to malformed BGP
UPDATE packet (CVE-2018-0020)


CVSS Score: 7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Risk Level: High
Risk Assessment: Information for how Juniper Networks uses CVSS can be found at
KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security
Advisories."


Product Affected:

This issue affects Junos OS 13.2, 14.1X53, 15.1, 15.1X49, 15.1X53, 16.1, 16.2,
17.1, 17.2, 17.2X75.


Problem:

Junos OS 13.2R1 and later releases may be impacted by the receipt of a malformed
BGP UPDATE which can lead to a routing process daemon (rpd) crash and restart.
Receipt of a repeated malformed BGP UPDATEs can result in an extended denial of
service condition for the device.  This malformed BGP UPDATE does not propagate
to other BGP peers.

Affected releases are Juniper Networks Junos OS:

    14.1X53 versions prior to 14.1X53-D47;
    15.1 versions prior to 15.1F6-S10, 15.1R4-S9, 15.1R6-S6, 15.1R7;
    15.1X49 versions prior to 15.1X49-D130 on SRX;
    15.1X53 versions prior to 15.1X53-D66 on QFX10K;
    15.1X53 versions prior to 15.1X53-D58 on EX2300/EX3400;
    15.1X53 versions prior to 15.1X53-D233 on QFX5200/QFX5110;
    15.1X53 versions prior to 15.1X53-D471 on NFX;
    16.1 versions prior to 16.1R3-S8, 16.1R4-S9, 16.1R5-S3, 16.1R6-S3, 16.1R7;
    16.1X65 versions prior to 16.1X65-D47;
    16.2 versions prior to 16.2R1-S6, 16.2R2-S5, 16.2R3;
    17.1 versions prior to 17.1R2-S3, 17.1R3;
    17.2 versions prior to 17.2R1-S3, 17.2R2-S1, 17.2R3;
    17.2X75 versions prior to 17.2X75-D70;

Versions prior to 13.2R1 are not affected.

This issue was found during internal product security testing or research.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

No other Juniper Networks products or platforms are affected by this issue.

This issue has been assigned CVE-2018-0020.


Solution:

The following software releases have been updated to resolve this specific
issue: 14.1X53-D47, 15.1F6-S10, 15.1R4-S9, 15.1R6-S6, 15.1R7, 15.1X49-D130,
15.1X53-D233, 15.1X53-D471, 15.1X53-D58, 15.1X53-D66, 16.1R3-S8, 16.1R4-S9,
16.1R5-S3, 16.1R6-S3, 16.1R7, 16.1X65-D47, 16.2R1-S6, 16.2R2-S5, 16.2R3,
17.1R2-S3, 17.1R3, 17.2R1-S3, 17.2R2-S1, 17.2R3, 17.2X75-D70, 17.3R1 and all
subsequent releases.

This issue is being tracked as 1299199 which is 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)


Workaround:

While there is no workaround, the risk associated with this issue can be
mitigated by limiting BGP sessions only from trusted peers.


Implementation:

Software Releases, patches and updates are available at
https://www.juniper.net/support/downloads/.


Modification History:

    2018-04-11: Initial Publication.

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