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CVE-2020-8244

Status: ModifiedMedium (6.5)—

A buffer over-read vulnerability exists in bl <4.0.3, <3.0.1, <2.2.1, and <1.2.3 which could allow an attacker to supply user input (even typed) that if it ends up in consume() argument and can become negative, the BufferList state can be corrupted, tricking it into exposing uninitialized memory via regular .slice() calls.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Bufferlist Project — BufferlistDebian — Debian Linux

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2020-8244",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
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          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "confidentialityImpact": "LOW"
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  "affected": [
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      "affectedData": [
        {
          "vendor": "n/a",
          "product": "bl",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in 4.0.3, 3.0.1, 2.2.1, and 1.2.3"
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  "published": "2020-08-30T15:15:12.167",
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  "vulnStatus": "Modified",
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      "type": "Secondary",
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      "description": [
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    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de lectura excesiva del búfer en bl versiones anteriores a 4.0.3, versiones anteriores a 3.0.1, versiones anteriores a 2.2.1 versiones anteriores a 1.2.3 que podría permitir a un atacante suministrar información del usuario (incluso escrita) que si termina en el argumento de consume() y puede volverse negativa, el estado de BufferList puede estar corrupto, engañándolo para que exponga la memoria no inicializada por medio de llamadas regulares de .slice()"
    }
  ],
  "lastModified": "2026-06-17T03:26:07.343",
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