CVE-2021-3999
Estado: ModificadaAlta (7.8)—
A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.75%
- Percentil entre todas las CVEs puntuadas: 53
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (10)
CWE
- CWE-193
- CWE-193
Referencias
- https://access.redhat.com/security/cve/CVE-2021-3999
- https://bugzilla.redhat.com/show_bug.cgi?id=2024637
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
- https://security-tracker.debian.org/tracker/CVE-2021-3999
- https://security.netapp.com/advisory/ntap-20221104-0001/
- https://sourceware.org/bugzilla/show_bug.cgi?id=28769
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
- https://www.openwall.com/lists/oss-security/2022/01/24/4
- https://access.redhat.com/security/cve/CVE-2021-3999
- https://bugzilla.redhat.com/show_bug.cgi?id=2024637
- https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
- https://security-tracker.debian.org/tracker/CVE-2021-3999
- https://security.netapp.com/advisory/ntap-20221104-0001/
- https://sourceware.org/bugzilla/show_bug.cgi?id=28769
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
- https://www.openwall.com/lists/oss-security/2022/01/24/4
JSON original (NVD)
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