CVE-2021-45417

Exp

AIDE before 0.17.4 allows local users to obtain root privileges via crafted file metadata (such as XFS extended attributes or tmpfs ACLs), because of a heap-based buffer overflow.

Published: 2022-01-20 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-45417 is rated High Exploit Risk (60/100): CVSS High severity, with low exploitation likelihood (EPSS 0.49%). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-45417

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-45417

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.04% 0.49% +0.46%
2 2025-11-21 0.08% 0.04% -0.04%
3 2025-11-18 — 0.08% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45417

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2021-45417

OS Trackers for CVE-2021-45417

vendor priority summary link
debian not yet assigned CVE-2021-45417 not yet assigned priority: Debian including 1 source packages (aide), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2021-45417
gentoo high CVE-2021-45417: 1 GLSA(s) (202311-07), 1 atom(s) (app-forensics/aide); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-45417
redhat high — https://access.redhat.com/security/cve/CVE-2021-45417
suse high CVE-2021-45417 severity important: SUSE including 11 source package names (aide-0.13.1-40.16.6.1, aide-0.15.1-13.el7_9.1, …), 106 product×package rows across 104 product lines (HPE Helion OpenStack 8, Image SLES15-SP4-Hardened-BYOS, … (104 product lines)): Fixed 106. https://www.suse.com/security/cve/CVE-2021-45417/
ubuntu medium CVE-2021-45417 medium priority: Ubuntu including 1 source packages (aide), 8 status rows across 8 suites (bionic, focal, hirsute, impish, jammy, trusty, upstream, xenial): released 7, not-affected 1. https://ubuntu.com/security/CVE-2021-45417

Affected software / configurations for CVE-2021-45417

Vendor Product Version Raw CPE
advanced_intrusion_detection_environment_project advanced_intrusion_detection_environment >= 0.13, <= 0.17.3 cpe:2.3:a:advanced_intrusion_detection_environment_project:advanced_intrusion_detection_environment:*:*:*:*:*:*:*:*
redhat ovirt-node 4.4.10 cpe:2.3:a:redhat:ovirt-node:4.4.10:*:*:*:*:*:*:*
redhat virtualization_host 4.0 cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*
redhat enterprise_linux 6.0 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
redhat enterprise_linux 7.0 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
fedoraproject fedora 35 cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 20.04 cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 21.04 cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*
canonical ubuntu_linux 21.10 cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2021-45417

URL Tags
http://www.openwall.com/lists/oss-security/2022/01/20/3 Exploit Mailing List Mitigation Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00024.html Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202311-07
https://www.debian.org/security/2022/dsa-5051 Third Party Advisory
https://www.ipi.fi/pipermail/aide/2022-January/001713.html Exploit Mailing List Mitigation Patch Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/20/3 Exploit Mailing List Mitigation Patch Third Party Advisory
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