CVE-2020-8597

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 20%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

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)
EG Risk
75(Track)
EG Risk 75/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
97.1%
KEV
Not listed

Published

February 3, 2020

Last Modified

December 3, 2025

Advisory Details (6)

Auto-updated Jul 6, 2026
Patch available. Sources: redhat, github_commit.
github_commit Patch Available

commit 8d7970b8f3db (paulusmack/ppp)

Patch available: paulusmack/ppp ppp-2.5.0 (contains commit 8d7970b8f3db)

https://github.com/paulusmack/ppp/commit/8d7970b8f3db727fe798b65f3377fe6787575426
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2020:0634
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2020:0633
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.

https://access.redhat.com/errata/RHSA-2020:0631
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2020:0630
generic

Full Disclosure: Buffer overflow in pppd - CVE-2020-8597

http://seclists.org/fulldisclosure/2020/Mar/6

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.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuppp-udeb (2.4.7-1+2ubuntu1.16.04.2) @ xenial2026-05-27ubuntu
ubuntuppp-dev (2.4.5-5.1ubuntu2.3+esm1) @ trusty2026-05-27ubuntu
redhatppp-0:2.4.5-34.el7_72020-02-27redhat
redhatppp-0:2.4.7-26.el8_12020-02-27redhat
redhatppp-0:2.4.7-26.el8_02020-02-27redhat
redhatppp-0:2.4.5-11.el6_102020-02-27redhat

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.

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 12× in last 7d / 43× 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.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:55 UTCEG score recompute
  3. 2026-07-22 22:41 UTCEG score recompute
  4. 2026-07-22 14:05 UTCEPSS rescore
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  9. 2026-07-19 20:18 UTCOSV refresh
  10. 2026-07-19 02:26 UTCEPSS rescore
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  1. 2026-07-08 15:12 UTCEPSS rescore
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  3. 2026-07-06 02:21 UTCEPSS rescore
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  5. 2026-07-05 02:28 UTCEPSS rescore
  6. 2026-07-05 02:28 UTCEPSS rescore
  7. 2026-07-02 16:57 UTCEPSS rescore
  8. 2026-07-02 11:11 UTCOSV refresh
  9. 2026-07-01 15:03 UTCEPSS rescore
  10. 2026-06-28 14:05 UTCEPSS rescore
  11. 2026-06-28 04:54 UTCEPSS rescore
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  19. 2026-06-23 21:31 UTCEPSS rescore
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  21. 2026-06-22 14:23 UTCEPSS rescore
  22. 2026-06-21 01:57 UTCEPSS rescore
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  24. 2026-06-19 19:24 UTCEPSS rescore
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  26. 2026-06-18 17:51 UTCEPSS rescore
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  30. 2026-06-15 17:46 UTCEPSS rescore
  31. 2026-06-14 09:43 UTCOSV refresh
  32. 2026-06-13 22:58 UTCEPSS rescore
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  40. 2026-06-07 15:23 UTCEPSS rescore
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  42. 2026-06-06 13:46 UTCEPSS rescore
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  45. 2026-06-05 22:45 UTCEPSS rescore
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  49. 2026-06-04 13:10 UTCEPSS rescore
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  51. 2026-06-02 20:11 UTCEPSS rescore
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  53. 2026-06-01 13:50 UTCEPSS rescore
  54. 2026-05-31 22:29 UTCEPSS rescore
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  56. 2026-05-31 00:15 UTCEPSS rescore
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  58. 2026-05-29 13:42 UTCEPSS rescore
  59. 2026-05-28 13:43 UTCEPSS rescore
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  61. 2026-05-27 13:39 UTCEPSS rescore
  62. 2026-05-27 13:39 UTCEPSS rescore
  63. 2026-05-27 08:20 UTCEG score recompute
  64. 2026-05-27 08:20 UTCVendor advisory
  65. 2026-05-27 08:20 UTCGHSA enrichment
  66. 2026-05-26 13:42 UTCEPSS rescore
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  68. 2026-05-26 07:17 UTCEPSS rescore
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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 97.1% 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

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