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
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 20%CVSS: 9.8Exploit: Elevated riskExposed: 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 PROB
20%
EPSS %ILE
97%
KEV
Not listed

Published

February 3, 2020

Last Modified

December 3, 2025

Advisory Details (9)

Auto-updated Sep 17, 2026
Patch available. Sources: github_commit, redhat.
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
generic
https://cert-portal.siemens.com/productcert/pdf/ssa-809841.pdf
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
generic

Locked Out | Packet Storm

http://packetstormsecurity.com/files/156802/pppd-2.4.8-Buffer-Overflow.html
generic

Locked Out | Packet Storm

http://packetstormsecurity.com/files/156662/pppd-2.4.8-Buffer-Overflow.html

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.

Affected Packages

(28 across 24 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
lwip—2.1.2+dfsg1-5—
ppp—2.4.8-1+1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
lwip—2.1.2+dfsg1-5—
ppp—2.4.8-1+1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
lwip—2.1.2+dfsg1-5—
ppp—2.4.8-1+1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
lwip—2.1.2+dfsg1-5—
ppp—2.4.8-1+1—
Alpine:v3.10(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.7-r7—
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.7-r7—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.8-r1—
Alpine:v3.8(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.7-r7—
Alpine:v3.9(1)
PackageVulnerable rangeFixed inDependents
ppp—2.4.7-r7—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
ppp2.4.7-2+4.12.4.7-2+4.1+deb10u1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
ppp2.4.6-3.12.4.6-3.1+deb8u1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
ppp2.4.7-1+42.4.7-1+4+deb9u1—

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 5× in last 7d / 22× 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.

Showing the most recent 100 of 140 total refreshes for this CVE.

  1. 2026-09-19 15:37 UTCEPSS rescore
  2. 2026-09-18 19:23 UTCEPSS rescore
  3. 2026-09-17 19:22 UTCEPSS rescore
  4. 2026-09-16 14:04 UTCEPSS rescore
  5. 2026-09-15 03:06 UTCEPSS rescore
  6. 2026-09-12 14:57 UTCEPSS rescore
  7. 2026-09-08 21:56 UTCEPSS rescore
  8. 2026-09-07 19:51 UTCOSV refresh
  9. 2026-09-07 15:58 UTCEPSS rescore
  10. 2026-09-06 13:44 UTCEPSS rescore
  11. 2026-09-05 15:25 UTCEPSS rescore
  12. 2026-09-04 13:57 UTCEPSS rescore
  13. 2026-09-04 13:57 UTCEPSS rescore
  14. 2026-09-04 05:03 UTCEPSS rescore
  15. 2026-09-02 14:08 UTCEPSS rescore
  16. 2026-09-01 03:32 UTCEPSS rescore
  17. 2026-08-30 19:14 UTCEPSS rescore
  18. 2026-08-30 01:19 UTCEPSS rescore
  19. 2026-08-28 21:37 UTCEPSS rescore
  20. 2026-08-27 14:21 UTCEPSS rescore
  21. 2026-08-26 14:42 UTCEPSS rescore
  22. 2026-08-21 23:45 UTCEPSS rescore
  23. 2026-08-21 05:14 UTCOSV refresh
  24. 2026-08-19 17:00 UTCEPSS rescore
  25. 2026-08-18 13:44 UTCEPSS rescore
Show 75 more
  1. 2026-08-16 14:52 UTCEPSS rescore
  2. 2026-08-16 02:11 UTCEPSS rescore
  3. 2026-08-15 01:27 UTCEPSS rescore
  4. 2026-08-13 21:57 UTCEPSS rescore
  5. 2026-08-12 13:47 UTCEPSS rescore
  6. 2026-08-09 13:43 UTCEPSS rescore
  7. 2026-08-08 16:33 UTCEPSS rescore
  8. 2026-08-07 16:23 UTCEPSS rescore
  9. 2026-08-06 13:43 UTCEPSS rescore
  10. 2026-08-05 20:24 UTCOSV refresh
  11. 2026-08-05 19:14 UTCEPSS rescore
  12. 2026-08-04 15:06 UTCEPSS rescore
  13. 2026-08-04 10:34 UTCEPSS rescore
  14. 2026-08-02 02:24 UTCEPSS rescore
  15. 2026-08-01 04:12 UTCEPSS rescore
  16. 2026-07-30 16:25 UTCEPSS rescore
  17. 2026-07-30 01:27 UTCEPSS rescore
  18. 2026-07-28 15:33 UTCEPSS rescore
  19. 2026-07-26 14:52 UTCEPSS rescore
  20. 2026-07-25 14:15 UTCEPSS rescore
  21. 2026-07-24 14:15 UTCEPSS rescore
  22. 2026-07-23 14:15 UTCEPSS rescore
  23. 2026-07-23 01:55 UTCEG score recompute
  24. 2026-07-22 22:41 UTCEG score recompute
  25. 2026-07-22 14:05 UTCEPSS rescore
  26. 2026-07-21 15:22 UTCEPSS rescore
  27. 2026-07-21 15:22 UTCEPSS rescore
  28. 2026-07-20 17:04 UTCEPSS rescore
  29. 2026-07-20 17:04 UTCEPSS rescore
  30. 2026-07-19 20:18 UTCOSV refresh
  31. 2026-07-19 02:26 UTCEPSS rescore
  32. 2026-07-19 02:26 UTCEPSS rescore
  33. 2026-07-18 10:02 UTCEPSS rescore
  34. 2026-07-16 17:00 UTCEPSS rescore
  35. 2026-07-15 16:55 UTCEPSS rescore
  36. 2026-07-15 16:55 UTCEPSS rescore
  37. 2026-07-15 01:57 UTCEPSS rescore
  38. 2026-07-13 22:27 UTCEPSS rescore
  39. 2026-07-13 22:27 UTCEPSS rescore
  40. 2026-07-13 06:10 UTCEPSS rescore
  41. 2026-07-13 06:10 UTCEPSS rescore
  42. 2026-07-12 05:44 UTCEPSS rescore
  43. 2026-07-12 05:44 UTCEPSS rescore
  44. 2026-07-11 08:25 UTCEPSS rescore
  45. 2026-07-11 08:25 UTCEPSS rescore
  46. 2026-07-09 19:07 UTCEPSS rescore
  47. 2026-07-08 15:12 UTCEPSS rescore
  48. 2026-07-06 16:25 UTCEPSS rescore
  49. 2026-07-06 02:21 UTCEPSS rescore
  50. 2026-07-06 02:21 UTCEPSS rescore
  51. 2026-07-05 02:28 UTCEPSS rescore
  52. 2026-07-05 02:28 UTCEPSS rescore
  53. 2026-07-02 16:57 UTCEPSS rescore
  54. 2026-07-02 11:11 UTCOSV refresh
  55. 2026-07-01 15:03 UTCEPSS rescore
  56. 2026-06-28 14:05 UTCEPSS rescore
  57. 2026-06-28 04:54 UTCEPSS rescore
  58. 2026-06-28 04:54 UTCEPSS rescore
  59. 2026-06-27 03:06 UTCEPSS rescore
  60. 2026-06-27 03:06 UTCEPSS rescore
  61. 2026-06-25 13:48 UTCEPSS rescore
  62. 2026-06-25 13:48 UTCEPSS rescore
  63. 2026-06-24 14:03 UTCEPSS rescore
  64. 2026-06-24 14:03 UTCEPSS rescore
  65. 2026-06-23 21:31 UTCEPSS rescore
  66. 2026-06-23 21:31 UTCEPSS rescore
  67. 2026-06-22 14:23 UTCEPSS rescore
  68. 2026-06-21 01:57 UTCEPSS rescore
  69. 2026-06-21 01:57 UTCEPSS rescore
  70. 2026-06-19 19:24 UTCEPSS rescore
  71. 2026-06-19 19:24 UTCEPSS rescore
  72. 2026-06-18 17:51 UTCEPSS rescore
  73. 2026-06-18 17:50 UTCEPSS rescore
  74. 2026-06-17 17:50 UTCEPSS rescore
  75. 2026-06-16 17:50 UTCEPSS rescore

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 ↗

Related CVEs(same CWE)

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 20% probability of exploitation in the next 30 days, which ranks it in the top 2.7% of all scored CVEs.
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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