How severe is CVE-2017-2304?

CVE-2017-2304 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-2304 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-2304?

CVE-2017-2304 primarily affects Juniper Junos. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-2304?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-2304 published?

CVE-2017-2304 was published on 2017-05-30 and last updated on 2026-06-17.

CVE-2017-2304

CVE-2017-2304 is a high-severity vulnerability in Juniper Junos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Juniper Junos
Published: 2017-05-30
Last modified: 2026-06-17

Description

Juniper Networks QFX3500, QFX3600, QFX5100, QFX5200, EX4300 and EX4600 devices running Junos OS 14.1X53 prior to 14.1X53-D40, 15.1X53 prior to 15.1X53-D40, 15.1 prior to 15.1R2, do not pad Ethernet packets with zeros, and thus some packets can contain fragments of system memory or data from previous packets. This issue is also known as 'Etherleak'

Frequently asked questions

What is CVE-2017-2304?: Juniper Networks QFX3500, QFX3600, QFX5100, QFX5200, EX4300 and EX4600 devices running Junos OS 14.1X53 prior to 14.1X53-D40, 15.1X53 prior to 15.1X53-D40, 15.1 prior to 15.1R2, do not pad Ethernet packets with zeros, and thus some packets can contain fragments of system memory or data from previous packets. This issue is also known as 'Etherleak'
How severe is CVE-2017-2304?: CVE-2017-2304 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-2304 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-2304?: CVE-2017-2304 primarily affects Juniper Junos. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-2304?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-2304 published?: CVE-2017-2304 was published on 2017-05-30 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:o:juniper:junos:14.1x53:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d10:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d15:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d16:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d26:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d27:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:14.1x53:d35:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d20:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d21:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d25:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d30:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d32:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d33:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:15.1x53:d34:*:*:*:*:*:*

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