CVE-2019-0071: Junos OS: EX2300, EX3400 Series: Veriexec signature checking not enforced in specific versions of Junos OS
First published: Wed Oct 09 2019(Updated: )
Veriexec is a kernel-based file integrity subsystem in Junos OS that ensures only authorized binaries are able to be executed. Due to a flaw in specific versions of Junos OS, affecting specific EX Series platforms, the Veriexec subsystem will fail to initialize, in essence disabling file integrity checking. This may allow a locally authenticated user with shell access to install untrusted executable images, and elevate privileges to gain full control of the system. During the installation of an affected version of Junos OS are installed, the following messages will be logged to the console: Initializing Verified Exec: /sbin/veriexec: Undefined symbol "__aeabi_uidiv" /sbin/veriexec: Undefined symbol "__aeabi_uidiv" /sbin/veriexec: Undefined symbol "__aeabi_uidiv" veriexec: /.mount/packages/db/os-kernel-prd-arm-32-20190221.70c2600_builder_stable_11/boot/brcm-hr3.dtb: Authentication error veriexec: /.mount/packages/db/os-kernel-prd-arm-32-20190221.70c2600_builder_stable_11/boot/contents.izo: Authentication error ... This issue affects Juniper Networks Junos OS: 18.1R3-S4 on EX2300, EX2300-C and EX3400; 18.3R1-S3 on EX2300, EX2300-C and EX3400.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | =18.1-r3-s4 | |
| Juniper JUNOS | =18.3-r1-s3 | |
| Juniper Ex2300 | ||
| Juniper Ex2300-c | ||
| Juniper Ex3400 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS: 18.1R3-S5, 18.3R1-S4, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is CVE-2019-0071?
CVE-2019-0071 is a vulnerability in the Veriexec subsystem in Junos OS that can disable file integrity checks.
Which versions of Junos OS are affected by CVE-2019-0071?
Versions 18.1-r3-s4 and 18.3-r1-s3 of Junos OS are affected by CVE-2019-0071.
What is the severity of CVE-2019-0071?
CVE-2019-0071 has a severity score of 7.8 (high).
How does CVE-2019-0071 affect the Veriexec subsystem?
CVE-2019-0071 can cause the Veriexec subsystem to fail to initialize, disabling file integrity checks.
How can I fix CVE-2019-0071?
It is recommended to update to a patched version of Junos OS to fix CVE-2019-0071.
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- canonical/juniper ex3400