CVE-2018-18520: Buffer Overflow
First published: Fri Oct 19 2018(Updated: )
A flaw was found in elfutils through v0.174. An Invalid Memory Address Dereference exists in the function elf_end in libelf. 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. References: <a href="https://sourceware.org/bugzilla/show_bug.cgi?id=23787">https://sourceware.org/bugzilla/show_bug.cgi?id=23787</a> <a href="https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html">https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html</a> Upstream Patch: <a href="https://sourceware.org/git/?p=elfutils.git;a=commit;h=22d2d082d57a7470fadc0eae67179553f4919209">https://sourceware.org/git/?p=elfutils.git;a=commit;h=22d2d082d57a7470fadc0eae67179553f4919209</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 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =18.10 | |
| SUSE Linux | =15.0 | |
| SUSE Linux | =15.1 | |
| Red Hat Enterprise Linux Desktop | =7.0 | |
| Red Hat Enterprise Linux Server | =7.0 | |
| Red Hat Enterprise Linux Workstation | =7.0 |
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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=23787
- https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html
- https://usn.ubuntu.com/4012-1/
- https://launchpad.net/bugs/cve/CVE-2018-18520
- https://sourceware.org/git/?p=elfutils.git;a=commit;h=22d2d082d57a7470fadc0eae67179553f4919209
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1646478
- https://access.redhat.com/support/policy/updates/errata/
- https://access.redhat.com/security/cve/cve-2018-18520
- https://bugzilla.redhat.com/show_bug.cgi?id=1646477
- https://security-tracker.debian.org/tracker/CVE-2018-18520
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18520
- https://nvd.nist.gov/vuln/detail/CVE-2018-18520
- https://ubuntu.com/security/CVE-2018-18520
Frequently Asked Questions
What is the severity of CVE-2018-18520?
CVE-2018-18520 is classified as a medium severity vulnerability due to its potential impact on system stability.
How do I fix CVE-2018-18520?
To fix CVE-2018-18520, upgrade the elfutils package to version 0.183-1, 0.188-2.1, or 0.192-4 or later.
What type of vulnerability is CVE-2018-18520?
CVE-2018-18520 is an Invalid Memory Address Dereference vulnerability affecting the elf_end function in libelf.
Which systems are affected by CVE-2018-18520?
CVE-2018-18520 affects various versions of the elfutils package on Debian, Ubuntu, and OpenSUSE.
What are the potential consequences of CVE-2018-18520?
Exploiting CVE-2018-18520 may lead to application crashes or unexpected behavior due to memory manipulation.
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