SSL-Proxy feature on SRX devices fails to handle a hardware resource limitation which can be exploited by remote SSL/TLS servers to crash the flowd daemon. Repeated crashes of the flowd daemon can result in an extended denial of service condition. For this issue to occur, clients protected by the SRX device must initiate a connection to the malicious server. This issue affects: Juniper Networks Junos OS on SRX5000 Series: 12.3X48 versions prior to 12.3X48-D85; 15.1X49 versions prior to 15.1X49-D180; 17.3 versions prior to 17.3R3-S7; 17.4 versions prior to 17.4R2-S6, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R3; 18.3 versions prior to 18.3R2; 18.4 versions prior to 18.4R2; 19.1 versions prior to 19.1R2.
CVE-2019-0051
This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 6.5(low)
- EPSS
- 60.7%
- KEV
- Not listed
Published
October 9, 2019
Last Modified
November 21, 2024
References (2)
- sirt@juniperhttps://kb.juniper.net/JSA10973
- af854a3a-2127-422b-91ae-364da2661108https://kb.juniper.net/JSA10973
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 46× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-09 19:06 UTCEPSS rescore
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- 2026-05-26 07:17 UTCEPSS rescore
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- 2026-05-23 03:16 UTCEG score recompute
- 2026-05-23 03:16 UTCGHSA enrichment
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- CVE-2017-5638EG 9.8 KEVEPSS 100%CRITICAL
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- CVE-2018-0155NVD 8.6EG 9.0 KEVEPSS 94%HIGH
Frequently asked(5)
What is CVE-2019-0051?
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Is CVE-2019-0051 actively exploited?
What is the CVSS score of CVE-2019-0051?
How do I remediate CVE-2019-0051?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2019-0051
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