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2021-07 Security Bulletin: Junos OS: Multiple J-Web vulnerabilities resolved.

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Article ID: JSA11204 SECURITY_ADVISORIES Last Updated: 14 Jul 2021Version: 1.0
Product Affected:
These issues affect Junos OS 12.1X46, 12.3, 12.3X48, 15.1, 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4.
Problem:

Multiple J-Web vulnerabilities have been resolved in Juniper Networks Junos OS.

These issues affect:

Juniper Networks Junos OS

  • 12.1X46 versions prior to 12.1X46-D86 on SRX Series;
  • 12.3 versions prior to 12.3R12-S13 on EX Series;
  • 12.3X48 versions prior to 12.3X48-D80 on SRX Series;
  • 15.1 versions prior to 15.1R7-S4;
  • 15.1 versions prior to 15.1F6-S13 on MX Series, PTX Series and T Series;
  • 15.1X49 versions prior to 15.1X49-D171, 15.1X49-D180 on SRX Series;
  • 15.1X53 versions prior to 15.1X53-D591, 15.1X53-D69 on EX2300 Series, EX3400 Series, QFX10000 Series;
  • 16.1 versions prior to 16.1R7-S5;
  • 16.2 versions prior to 16.2R2-S9, 16.2R3;
  • 17.1 versions prior to 17.1R2-S12, 17.1R3;
  • 17.2 versions prior to 17.2R1-S8, 17.2R2-S7, 17.2R3-S1;
  • 17.3 versions prior to 17.3R2-S5, 17.3R3-S5;
  • 17.4 versions prior to 17.4R1-S7, 17.4R2-S6, 17.4R3;
  • 18.1 versions prior to 18.1R3-S4;
  • 18.2 versions prior to 18.2R1-S5, 18.2R2-S3, 18.2R3;
  • 18.3 versions prior to 18.3R1-S3, 18.3R2;
  • 18.4 versions prior to 18.4R1-S3, 18.4R2.

The following minimal configuration is necessary:

[system services web-management http]

or

[system services web-management https]

Juniper SIRT is not aware of any malicious exploitation of these vulnerabilities.

These issues were discovered during external security research.

Important security issues resolved include:

CVE CVSS Summary
CVE-2014-9708 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Embedthis Appweb before 4.6.6 and 5.x before 5.2.1 allows remote attackers to cause a denial of service (NULL pointer dereference) via a Range header with an empty value, as demonstrated by "Range: x=,".
CVE-2018-15504 7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. The server mishandles some HTTP request fields associated with time, which results in a NULL pointer dereference, as demonstrated by If-Modified-Since or If-Unmodified-Since with a month greater than 11.
Solution:

The following software releases have been updated to resolve these specific issues: Junos OS: 12.1X46-D86, 12.3R12-S13, 12.3X48-D80, 15.1F6-S13, 15.1R7-S4, 15.1X49-D171, 15.1X49-D180, 15.1X53-D591, 15.1X53-D69, 16.1R7-S5, 16.2R2-S9, 16.2R3, 17.1R2-S12, 17.1R3, 17.2R1-S8, 17.2R2-S7, 17.2R3-S1, 17.3R2-S5, 17.3R3-S5, 17.4R1-S7, 17.4R2-S6, 17.4R3, 18.1R3-S4, 18.2R1-S5, 18.2R2-S3, 18.2R3, 18.3R1-S3, 18.3R2, 18.4R1-S3, 18.4R2, 19.1R1 and all subsequent releases.

These issues are being tracked as 1417434.

Workaround:

There are no viable workarounds for these issues other than disabling J-Web.

To reduce the risk of exploitation of these issues, use access lists or firewall filters to limit access to only trusted administrative networks, hosts and users.

Implementation:
Software releases or updates are available for download at https://support.juniper.net/support/downloads/
 
Modification History:
2021-07-14: Initial Publication.

CVSS Score:
7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/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."
Acknowledgements:
The Juniper SIRT wishes to thank Rishabh Kumar Pandey with Wipro for responsibly reporting one of the issues resolved in this update.

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