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Fencer Intel
high 7.8

CVE-2021-45417 json

AIDE before 0.17.4 allows local users to obtain root privileges via crafted file metadata (such as XFS extended attributes or tmpfs ACLs),…

published 4y ago modified 4mo ago also EUVD-2021-32188

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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.

Patch / fix

  • aide Debian 14, Debian 13, Debian 12 0.17.4-1

debian advisories DEBIAN-CVE-2021-45417

  • aide Ubuntu 18.04 LTS 0.16-3ubuntu0.1
  • aide Ubuntu 20.04 LTS 0.16.1-1ubuntu0.1
  • aide Ubuntu Pro 14.04 LTS 0.16~a2.git20130520-2ubuntu0.1+esm1
  • aide Ubuntu Pro 16.04 LTS 0.16~a2.git20130520-3ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2021-45417

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • redhat-virtualization-host RHEL 7 4.3.22-20220330.1.el7_9
  • redhat-virtualization-host-image-update RHEL 7 4.3.22-20220330.1.el7_9
  • aide RHEL 8 0.16-14.el8_5.1
  • redhat-virtualization-host rhev hypervisor 4.4 4.4.10-202202081536_8.5
  • redhat-virtualization-host-image-update rhev hypervisor 4.4 4.4.10-202202081536_8.5
  • aide RHEL 7 0.15.1-13.el7_9.1
  • aide RHEL 8.1 E4S 0.16-11.el8_1.1
  • aide RHEL 8.4 EUS 0.16-14.el8_4.1

red hat advisories RHSA-2022:1263RHSA-2022:0464RHSA-2022:0440RHSA-2022:0441RHSA-2022:0540RHSA-2022:0472

  • aide SLES 15 SP2-BCL, SLES 15 SP1-BCL, SLE Real Time 15 SP2 +19 more 0.16-24.1
  • aide SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 0.13.1-40.16.6.1
  • aide SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +10 more 0.16-20.15.1

suse advisories SUSE-SU-2022:0150-2SUSE-SU-2022:14879-1SUSE-SU-2022:0150-1SUSE-SU-2022:0145-1

  • aide openSUSE Tumbleweed 0.17.4-1.1
  • aide openSUSE Leap 15.3 0.16-24.1
  • seamonkey openSUSE Leap 15.3 2.53.12-lp153.17.8.2

opensuse advisories openSUSE-SU-2024:11960-1openSUSE-SU-2022:0150-1

  • aide AlmaLinux 8 0.16-14.el8_5.1

almalinux advisories ALSA-2022:0441

  • aide Rocky Linux 8 0.16-14.el8_5.1

rocky linux advisories RLSA-2022:0441

Is CVE-2021-45417 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-45417 updated cvss 7.5

aide: heap-based buffer overflow on outputs larger than B64_BUF

  • Red Hat Enterprise Linux AppStream (v. 8) aide 0.16-14.el8_5.1
    fixed: vendor fix RHSA-2022:0441
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) aide 0.16-11.el8_1.1
    fixed: vendor fix RHSA-2022:0464
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) aide 0.16-11.el8_2.1
    fixed: vendor fix RHSA-2022:0456
  • Red Hat Enterprise Linux AppStream EUS (v.8.4) aide 0.16-14.el8_4.1
    fixed: vendor fix RHSA-2022:0440
  • Red Hat Enterprise Linux Client (v. 7) aide 0.15.1-13.el7_9.1
    fixed: vendor fix RHSA-2022:0473
  • Red Hat Enterprise Linux Server (v. 6 ELS) aide 0.14-11.el6_10.1
    fixed: vendor fix RHSA-2022:0472
  • Red Hat Enterprise Linux Server (v. 7) aide 0.15.1-13.el7_9.1 Red Hat Enterprise Linux Workstation (v. 7) aide 0.15.1-13.el7_9.1
    fixed: vendor fix RHSA-2022:0473
  • Red Hat Virtualization 4 Hypervisor for RHEL 7 redhat-virtualization-host 4.3.22-20220330.1.el7_9, redhat-virtualization-host-image-update 4.3.22-20220330.1.el7_9
    fixed: vendor fix RHSA-2022:1263
show 3 more
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host 4.4.10-202202081536_8.5, redhat-virtualization-host-image-update 4.4.10-202202081536_8.5
    fixed: vendor fix RHSA-2022:0540
  • Red Hat RHEL 7-based RHEV-H for RHEV 4 (build requirements) redhat-virtualization-host 4.3.22-20220330.1.el7_9, redhat-virtualization-host-image-update 4.3.22-20220330.1.el7_9
    fixed: vendor fix RHSA-2022:1263
  • Red Hat Enterprise Linux 9 aide Red Hat Virtualization 4 Hypervisor for RHEL 8 wget 1.19.5-10.el8, libmetalink 0.1.3-7.el8 Red Hat RHEL 7-based RHEV-H for RHEV 4 (build requirements) redhat-release-virtualization-host 4.3.22-1.el7ev, redhat-virtualization-host-productimg 4.3.22-1.el7, redhat-virtualization-host-image-update-placeholder 4.3.22-1.el7ev Red Hat RHEL 8-based RHEV-H for RHEV 4 (build requirements) redhat-release-virtualization-host 4.4.10-1.el8ev, redhat-release-virtualization-host-content 4.4.10-1.el8ev, redhat-virtualization-host-image-update-placeholder 4.4.10-1.el8ev
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • openwall.com https://www.openwall.com/lists/oss-security/2022/01/20/3 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://www.openwall.com/lists/oss-security/2022/01/20/3 referenced PoC, tagged "exploit" by a source, unverified
  • ipi.fi https://www.ipi.fi/pipermail/aide/2022-January/001713.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.