CVE-2018-18521
MEDIUMCVSS 5.5/10EPSS 1.82%
Last modified
CVE-2018-18521 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Divide-by-zero vulnerabilities in the function arlib_add_symbols() in arlib.c in elfutils 0.174 allow remote attackers to cause a denial of service (application crash) with a crafted ELF file, as demonstrated by eu-ranlib, because a zero sh_entsize is mishandled.. EPSS estimates a 1.82% chance of exploitation in the next 30 days.
Description
Divide-by-zero vulnerabilities in the function arlib_add_symbols() in arlib.c in elfutils 0.174 allow remote attackers to cause a denial of service (application crash) with a crafted ELF file, as demonstrated by eu-ranlib, because a zero sh_entsize is mishandled.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Elfutils Project | Elfutils | 0.174 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Workstation | 7.0 |
| Opensuse | Leap | 15.0 |
| Opensuse | Leap | 15.1 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 18.10 |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.htmlMailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2197Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00036.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00030.htmlMailing List, Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=23786Exploit, Issue Tracking, Third Party Advisory
- https://sourceware.org/ml/elfutils-devel/2018-q4/msg00055.htmlMailing List, Patch, Third Party Advisory
- https://usn.ubuntu.com/4012-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.htmlMailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2197Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00036.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00030.htmlMailing List, Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=23786Exploit, Issue Tracking, Third Party Advisory
- https://sourceware.org/ml/elfutils-devel/2018-q4/msg00055.htmlMailing List, Patch, Third Party Advisory
- https://usn.ubuntu.com/4012-1/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-18521?
Divide-by-zero vulnerabilities in the function arlib_add_symbols() in arlib.c in elfutils 0.174 allow remote attackers to cause a denial of service (application crash) with a crafted ELF file, as demonstrated by eu-ranlib, because a zero sh_entsize is mishandled.
How severe is CVE-2018-18521?
CVE-2018-18521 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.82% probability of exploitation in the next 30 days.
How do I fix CVE-2018-18521?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2018-18521?
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Scan your code nowSource: NVD / NIST