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Fencer Vulns
medium 5.5

CVE-2024-23301 json

Relax-and-Recover (aka ReaR) through 2.7 creates a world-readable initrd when using GRUB_RESCUE=y.

published 2024-01-12 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-20820

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

Relax-and-Recover (aka ReaR) through 2.7 creates a world-readable initrd when using GRUB_RESCUE=y. This allows local attackers to gain access to system secrets otherwise only readable by root.

Patch / fix

  • rear Debian 12 2.7+dfsg-1+deb12u1
  • rear Debian 14, Debian 13 2.7+dfsg-1.2

debian advisories DEBIAN-CVE-2024-23301

  • rear Ubuntu 22.04 LTS 2.6+dfsg-1+deb11u1build0.22.04.1
  • rear Ubuntu Pro 18.04 LTS 2.3+dfsg-1ubuntu0.1~esm1
  • rear Ubuntu Pro 20.04 LTS 2.5+dfsg-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2024-23301

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

  • rear RHEL 8 2.6-11.el8_9
  • rear RHEL 9 2.6-21.el9_3

red hat advisories RHSA-2024:1719RHSA-2024:1147

  • rear27a SLE High Availability Extension 15 SP5, openSUSE Leap 15.5 2.7-150500.3.3.1
  • rear1172a SLE High Availability Extension 12 SP5 1.17.2.a-5.3.1
  • rear116 SLE High Availability Extension 12 SP5 1.16-15.3.1
  • rear27a SLE High Availability Extension 15 SP4, SLE High Availability Extension 15 SP3, SLE High Availability Extension 15 SP2 2.7-150200.5.6.1
  • rear23a SLE High Availability Extension 15 SP5, SLE High Availability Extension 15 SP4, SLE High Availability Extension 15 SP3 +1 more 2.3.a-150300.21.3.1
  • rear23a SLE High Availability Extension 15 SP2, SLE High Availability Extension 15 SP1 2.3.a-150000.9.9.1
  • rear118a SLE High Availability Extension 12 SP5 1.18.a-9.3.1
  • rear23a SLE High Availability Extension 12 SP5 2.3.a-3.9.1

suse advisories SUSE-SU-2024:0657-1SUSE-SU-2024:0292-1SUSE-SU-2024:0291-1SUSE-SU-2024:0253-1SUSE-SU-2024:0247-1SUSE-SU-2024:0239-1

  • rear openSUSE Tumbleweed 2.7-2.1

opensuse advisories openSUSE-SU-2024:13612-1

  • rear AlmaLinux 8 2.6-11.el8_9.alma.1
  • rear AlmaLinux 9 2.6-21.el9_3.alma

almalinux advisories ALSA-2024:1719ALSA-2024:1147

  • rear Rocky Linux 8 2.6-11.el8_9

rocky linux advisories RLSA-2024:1719

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-2024-23301 updated cvss 5.5

rear: creates a world-readable initrd

  • Red Hat Enterprise Linux 6 rear Red Hat Enterprise Linux 7 rear
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) rear 2.6-11.el8_9
    fixed: vendor fix RHSA-2024:1719
  • Red Hat Enterprise Linux AppStream (v. 9) rear 2.6-21.el9_3
    fixed: vendor fix RHSA-2024:1147

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/rear/rear/issues/3122 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Classification

Weakness
  • CWE-276 Incorrect Default Permissions

References

Sources

Fencer Vulns 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.