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CVE-2021-3999

Date: August 23, 2022

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.

Severity Score

Related Resources (13)

https://nvd.nist.gov/vuln/detail/CVE-2021-3999
https://bugzilla.redhat.com/show_bug.cgi?id=2024637
https://security-tracker.debian.org/tracker/CVE-2021-3999
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3999
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
https://access.redhat.com/errata/RHSA-2022:0896
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
https://access.redhat.com/security/cve/CVE-2021-3999
https://www.openwall.com/lists/oss-security/2022/01/24/4
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e
https://sourceware.org/bugzilla/show_bug.cgi?id=28769
https://security.netapp.com/advisory/ntap-20221104-0001/
https://www.mend.io/vulnerability-database/CVE-2021-3999

Severity Score

Weakness Type (CWE)

Off-by-one Error

CWE-193

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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