An issue was discovered in illumos before 2020-10-22, as used in OmniOS before r151030by, r151032ay, and r151034y and SmartOS before 20201022. There is a buffer overflow in parse_user_name in lib/libpam/pam_framework.c.
CVE-2020-27678
CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.4%, top 30% of all CVEs by exploit prediction. 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).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: 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 computedSeverity98% × 45%Exploitation1% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 72%
- KEV
- Not listed
Published
October 26, 2020
Last Modified
November 21, 2024
References (2)
- cve@mitrehttps://github.com/illumos/illumos-gate/commit/1d276e0b382cf066dae93640746d8b4c54d15452
- af854a3a-2127-422b-91ae-364da2661108https://github.com/illumos/illumos-gate/commit/1d276e0b382cf066dae93640746d8b4c54d15452
Related CVEs
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Frequently asked(5)
What is CVE-2020-27678?
CVE-2020-27678 is a critical vulnerability published on October 26, 2020. An issue was discovered in illumos before 2020-10-22, as used in OmniOS before r151030by, r151032ay, and r151034y and SmartOS before 20201022. There is a buffer overflow in parseusername in lib/libpam/pam_framework.c.
When was CVE-2020-27678 disclosed?
CVE-2020-27678 was first published in the National Vulnerability Database on October 26, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-27678 actively exploited?
CVE-2020-27678 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 28.0% of all scored CVEs.
What is the CVSS score of CVE-2020-27678?
CVE-2020-27678 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-27678?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-27678, 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
Explore the affected products and dependency analysis for CVE-2020-27678
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