2019-07 Security Bulletin: SRX Series: srxpfe process crash while JSF/UTM module parses specific HTTP packets (CVE-2019-0052)

Product Affected:

This issue affects SRX Series platforms running Junos OS.

Problem:

The srxpfe process may crash on SRX Series services gateways when the UTM module processes a specific fragmented HTTP packet. The packet is misinterpreted as a regular TCP packet which causes the processor to crash.

This issue affects all SRX Series platforms that support URL-Filtering and have web-filtering enabled.

Affected releases are Juniper Networks Junos OS:

12.3X48 versions prior to 12.3X48-D85 on SRX Series;
15.1X49 versions prior to 15.1X49-D181, 15.1X49-D190 on SRX Series;
17.3 versions on SRX Series;
17.4 versions prior to 17.4R1-S8, 17.4R2-S5, 17.4R3 on SRX Series;
18.1 versions prior to 18.1R3-S6 on SRX Series;
18.2 versions prior to 18.2R2-S1, 18.2R3 on SRX Series;
18.3 versions prior to 18.3R1-S2, 18.3R2 on SRX Series;
18.4 versions prior to 18.4R1-S1, 18.4R2 on SRX Series.

The following SRX Series services gateway web-filtering configuration is required:

security {
utm {
default-configuration {
web-filtering {
...
feature-profile {
web-filtering {

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

This issue was seen during production usage.

This issue has been assigned CVE-2019-0052.

Solution:

The following software releases have been updated to resolve this specific issue: 12.3X48-D85, 12.3X48-D90, 15.1X49-D181, 15.1X49-D190, 17.4R1-S8, 17.4R2-S5, 17.4R3, 18.1R3-S6, 18.2R2-S1, 18.2R3, 18.3R1-S2, 18.3R2, 18.4R1-S1, 18.4R2, 19.1R1, 19.2R1, and all subsequent releases.

This issue is being tracked as PR 1406403 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:

This issue can be mitigated by enabling HTTP reassembly in the web-filtering configuration:

set security utm default-configuration web-filtering http-reassemble

Implementation:

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

Modification History:

```
2019-07-10: 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."

Knowledge Base