What is CVE-2019-0071?

CVE-2019-0071 is a high-severity vulnerability in Juniper Ex2300, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.8/10. Published 2019-10-09.

How severe is CVE-2019-0071?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Juniper Ex2300

CVE-2019-0071

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.

Published 2019-10-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (8.1th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Juniper Ex2300
Juniper Ex2300-C
Juniper Ex3400
Juniper Junos — versions 18.1, 18.3
Juniper Networks Junos OS — versions 18.1R3-S4, 18.3R1-S3

Weakness classification (CWE)

References

kb.juniper.net/JSA10978 (Vendor Advisory)
www.juniper.net/documentation/en_US/junos/topics/concept/veriexec.html (Vendor Advisory)

Frequently asked questions

What is CVE-2019-0071?: CVE-2019-0071 is a high-severity vulnerability in Juniper Ex2300, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.8/10. Published 2019-10-09.
How severe is CVE-2019-0071?: High severity. CVSS v3 base score is 7.8 out of 10.