CVE-2018-18521: Divide by Zero
First published: Fri Oct 19 2018(Updated: )
A flaw was found in elfutils 0.174. A Divide-by-zero vulnerabilities in the function arlib_add_symbols() in arlib.c 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. References: <a href="https://sourceware.org/bugzilla/show_bug.cgi?id=23786">https://sourceware.org/bugzilla/show_bug.cgi?id=23786</a> <a href="https://sourceware.org/ml/elfutils-devel/2018-q4/msg00055.html">https://sourceware.org/ml/elfutils-devel/2018-q4/msg00055.html</a> Upstream Patch: <a href="https://sourceware.org/git/?p=elfutils.git;a=commit;h=2b16a9be69939822dcafe075413468daac98b327">https://sourceware.org/git/?p=elfutils.git;a=commit;h=2b16a9be69939822dcafe075413468daac98b327</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/elfutils | 0.183-1 0.188-2.1 0.192-4 | |
| CentOS Elfutils | =0.174 | |
| Debian | =8.0 | |
| Debian | =9.0 | |
| Red Hat Enterprise Linux Desktop | =7.0 | |
| Red Hat Enterprise Linux Server | =7.0 | |
| Red Hat Enterprise Linux Workstation | =7.0 | |
| SUSE Linux | =15.0 | |
| SUSE Linux | =15.1 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =18.10 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html
- https://access.redhat.com/errata/RHSA-2019:2197
- https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html
- https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html
- https://sourceware.org/bugzilla/show_bug.cgi?id=23786
- https://sourceware.org/ml/elfutils-devel/2018-q4/msg00055.html
- https://usn.ubuntu.com/4012-1/
- https://launchpad.net/bugs/cve/CVE-2018-18521
- https://sourceware.org/git/?p=elfutils.git;a=commit;h=2b16a9be69939822dcafe075413468daac98b327
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1646483
- https://access.redhat.com/support/policy/updates/errata/
- https://access.redhat.com/security/cve/cve-2018-18521
- https://bugzilla.redhat.com/show_bug.cgi?id=1646482
- https://security-tracker.debian.org/tracker/CVE-2018-18521
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18521
- https://nvd.nist.gov/vuln/detail/CVE-2018-18521
- https://ubuntu.com/security/CVE-2018-18521
Frequently Asked Questions
What is the severity of CVE-2018-18521?
CVE-2018-18521 is classified as a denial of service vulnerability that can cause an application crash.
How do I fix CVE-2018-18521?
To fix CVE-2018-18521, upgrade elfutils to version 0.183-1 or later.
Which versions of elfutils are affected by CVE-2018-18521?
CVE-2018-18521 affects elfutils version 0.174 and earlier.
Can CVE-2018-18521 be exploited remotely?
Yes, CVE-2018-18521 can be exploited remotely using a crafted ELF file.
What specific function in elfutils is vulnerable in CVE-2018-18521?
The function arlib_add_symbols() in arlib.c is where the divide-by-zero vulnerability occurs.
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