Article Detail

Product Affected

This issue affects all products and platforms running Junos OS with J-Web enabled.

Severity

High

Severity Assessment (CVSS) Score

7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Problem

Multiple vulnerabilities exist in the Embedthis Appweb server, used by J-Web, related to the way the server mishandles some HTTP headers and request fields. These issues may result in a Denial of Service (DoS) for the J-Web graphical user interface.

These issues affect Juniper Networks Junos OS:

12.3 versions prior to 12.3R12-S14;
12.3X48 versions prior to 12.3X48-D80;
15.1 versions prior to 15.1F6-S13, 15.1R7-S4;
15.1X49 versions prior to 15.1X49-D170;
15.1X53 versions prior to 15.1X53-D497;
16.1 versions prior to 16.1R4-S13, 16.1R7-S5;
16.2 versions prior to 16.2R2-S10;
17.1 versions prior to 17.1R3;
17.2 versions prior to 17.2R2-S7, 17.2R3-S1;
17.3 versions prior to 17.3R3-S5;
17.4 versions prior to 17.4R1-S7, 17.4R2-S4, 17.4R3;
18.1 versions prior to 18.1R3-S5.

Important security issues resolved include:

CVE	CVSS	Summary
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.
CVE-2018-15505	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. An HTTP POST request with a specially crafted "Host" header field may cause a NULL pointer dereference and thus cause a denial of service, as demonstrated by the lack of a trailing ']' character in an IPv6 address.

Solution

The following software releases have been updated to resolve this specific issue: 12.3R12-S14*, 12.3X48-D80, 15.1F6-S13, 15.1R7-S4, 15.1X49-D170, 15.1X53-D497, 16.1R4-S13, 16.1R7-S5, 16.2R2-S10, 17.1R3, 17.2R2-S7, 17.2R3-S1, 17.3R3-S5, 17.4R1-S7, 17.4R2-S4, 17.4R3, 18.1R3-S5, 18.2R1, and all subsequent releases.

* Late availability

This issue is being tracked as PR 1345330 which is visible on the Customer Support website.

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

Workaround

Disable J-Web, or limit access to only trusted hosts.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History