elfutils: eu-size cannot handle recursive ar files
Published Oct 19, 2018
6.5
MEDIUMCVSS 3.1
EPSS 2.79%
Description
An Invalid Memory Address Dereference exists in the function elf_end in libelf in elfutils through v0.174. Although eu-size is intended to support ar files inside ar files, handle_ar in size.c closes the outer ar file before handling all inner entries. The vulnerability allows attackers to cause a denial of service (application crash) with a crafted ELF file.
Affected products
No data.
Configuration 1
- ≤ 0.174
Configuration 2
- 8.0
- 9.0
Configuration 3
- 16.04
- 18.04
- 18.10
Configuration 5
- 7.0
- 7.0
- 7.0
No data.
Red Hat Ansible Tower 3.4 for RHEL 7
ansible-tower-34/ansible-tower-memcached:1.4.15-28
Fixed · RHBA-2020:0547
Red Hat Ansible Tower 3.4 for RHEL 7
ansible-tower-35/ansible-tower-memcached:1.4.15-28
Fixed · RHBA-2020:0547
Red Hat Ansible Tower 3.4 for RHEL 7
ansible-tower-37/ansible-tower-memcached-rhel7:1.4.15-28
Fixed · RHBA-2020:0547
Red Hat Enterprise Linux 7
elfutils-0:0.176-2.el7
Fixed · RHSA-2019:2197
Red Hat Enterprise Linux 5
elfutils
Will not fix
Red Hat Enterprise Linux 6
elfutils
Will not fix
Red Hat Enterprise Linux 8
elfutils
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Ansible Tower 3.4 for RHEL 7 | ansible-tower-34/ansible-tower-memcached:1.4.15-28 | Fixed | RHBA-2020:0547 |
| Red Hat Ansible Tower 3.4 for RHEL 7 | ansible-tower-35/ansible-tower-memcached:1.4.15-28 | Fixed | RHBA-2020:0547 |
| Red Hat Ansible Tower 3.4 for RHEL 7 | ansible-tower-37/ansible-tower-memcached-rhel7:1.4.15-28 | Fixed | RHBA-2020:0547 |
| Red Hat Enterprise Linux 7 | elfutils-0:0.176-2.el7 | Fixed | RHSA-2019:2197 |
| Red Hat Enterprise Linux 5 | elfutils | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | elfutils | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | elfutils | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of elfutils as shipped with Red Hat Enterprise Linux 5, 6, and 7. Red Hat Enterprise Linux 5 is now in Extended Life Phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/. Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Low, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.79% (0.02791) | 85.93th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.79% (0.02791) | 84.51th | v5 (v2026.06.15) |
| Nov 21, 2025 | 1.16% (0.01158) | 77.95th | v4 (v2025.03.14) |
| Nov 18, 2025 | 3.34% (0.03342) | 86.08th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.80% (0.00801) | 71.86th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.67% (0.02666) | 76.28th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.27% (0.00270) | 48.37th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.28% (0.00282) | 69.43th | v3 (v2023.03.01) |
| Jun 7, 2024 | 0.28% (0.00282) | 68.60th | v3 (v2023.03.01) |
| Mar 11, 2024 | 0.31% (0.00312) | 69.50th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.31% (0.00307) | 69.10th | v3 (v2023.03.01) |
| Oct 13, 2023 | 0.31% (0.00307) | 66.44th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.28% (0.00278) | 64.28th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00361) | 67.85th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.06% (0.02061) | 50.21th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.81% (0.01806) | 0.00th | v1 |
References (11)
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2197 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-18520 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1646477 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-18520
- https://sourceware.org/bugzilla/show_bug.cgi?id=23787 x_refsource_MISCExploitIssue TrackingThird Party Advisory
- https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html x_refsource_MISCMailing ListPatchThird Party Advisory
- https://usn.ubuntu.com/4012-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-18520
Change history (0)
No recorded changes yet.