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2020-07 Security Bulletin: Junos OS: SRX Series: Double free vulnerability can lead to DoS or remote code execution due to the processing of a specific HTTP message when ICAP redirect service is enabled (CVE-2020-1647)



Article ID: JSA11034 SECURITY_ADVISORIES Last Updated: 08 Jul 2020Version: 1.0
Product Affected:
This issue affects Junos OS 18.1, 18.2, 18.3, 18.4, 19.1, 19.2, 19.3.

On Juniper Networks SRX Series with ICAP (Internet Content Adaptation Protocol) redirect service enabled, a double free vulnerability can lead to a Denial of Service (DoS) or Remote Code Execution (RCE) due to processing of a specific HTTP message.

Continued processing of this specific HTTP message may result in an extended Denial of Service (DoS).

The offending HTTP message that causes this issue may originate both from the HTTP server or the client.

This issue affects Juniper Networks Junos OS on SRX Series:

18.1 versions prior to 18.1R3-S9;

18.2 versions prior to 18.2R3-S3;

18.3 versions prior to 18.3R2-S4, 18.3R3-S1;

18.4 versions prior to 18.4R2-S5, 18.4R3;

19.1 versions prior to 19.1R2;

19.2 versions prior to 19.2R1-S2, 19.2R2;

19.3 versions prior to 19.3R2.

This issue does not affect Juniper Networks Junos OS prior to 18.1R1.

This issue may occur only when ICAP Redirect Service is enabled.

The examples of minimum config stanza affected by this issue:

[services icap-redirect profile <ICAP_PROFILE_NAME>]

in combination with:

[security policies from-zone <ZONE_NAME> to-zone <ZONE_NAME> policy <POLICY_NAME> then permit application-services <ICAP_PROFILE_NAME>]

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-2020-1647.


The following software releases have been updated to resolve this specific issue: 18.1R3-S9, 18.2R3-S3, 18.3R2-S4, 18.3R3-S1, 18.4R2-S5, 18.4R3, 19.1R2, 19.2R1-S2, 19.2R2, 19.3R2, 19.4R1, and all subsequent releases.

This issue is being tracked as 1465286.


Disable ICAP redirect service otherwise there are no viable workarounds for this issue.

Software releases or updates are available for download at
Modification History:
‚Äč2020-07-08: Initial publication
CVSS Score:
9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Severity Level:
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."

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