CVE-2020-8597

CRITICALNVD 9.89.8—Elevated

9.8

eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 98.5%
KEV: Not listed

Published

February 3, 2020

Last Modified

December 3, 2025

References (44)

Vendor Advisories for CVE-2020-8597(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2020-8597
Microsoft Security Response Center (MSRC)
CVE-2020-8597

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	ppp-udeb (2.4.7-1+2ubuntu1.16.04.2) @ xenial	2026-05-27	ubuntu
ubuntu	ppp-dev (2.4.5-5.1ubuntu2.3+esm1) @ trusty	2026-05-27	ubuntu
redhat	ppp-0:2.4.5-34.el7_7	2020-02-27	redhat
redhat	ppp-0:2.4.7-26.el8_1	2020-02-27	redhat
redhat	ppp-0:2.4.7-26.el8_0	2020-02-27	redhat
redhat	ppp-0:2.4.5-11.el6_10	2020-02-27	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 08:20 UTCEG score recompute
2026-05-27 08:20 UTCVendor advisory
2026-05-27 08:20 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoClakwsh/CVE-2020-8597
First seen Jan 24, 2021
CVE-2020-8597 in RM2100
Open source ↗
GitHub PoCwinmin/CVE-2020-8597
First seen Mar 7, 2020
CVE-2020-8597 pppd buffer overflow poc
Open source ↗

Frequently asked(5)

What is CVE-2020-8597?

CVE-2020-8597 is a critical vulnerability published on February 3, 2020. eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eaprequest and eapresponse functions.

When was CVE-2020-8597 disclosed?

CVE-2020-8597 was first published in the National Vulnerability Database on February 3, 2020, with the most recent update on December 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-8597 actively exploited?

CVE-2020-8597 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-8597?

CVE-2020-8597 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-8597?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-8597, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-8597

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CVE-2020-8597

Published

Last Modified

References (44)

Vendor Advisories for CVE-2020-8597(1)

Patch Availability(6)

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-8597?

Same vendor

Same CWE

CVE-2020-8597

📅 Published

🔄 Last Modified

🔗 References (44)

📣 Vendor Advisories for CVE-2020-8597(1)

Patch Availability(6)

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-8597?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (44)

Vendor Advisories for CVE-2020-8597(1)

Frequently asked(5)

Related CVEs(same vendor + same CWE)