CVE-2018-18520

moderate-risk
Published 2018-10-19

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.

Do I need to act?

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0.89% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (11)

Affected Vendors

Debian Redhat Canonical Opensuse Elfutils Project

References (14)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:2197
Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html
Mailing List https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html
Exploit https://sourceware.org/bugzilla/show_bug.cgi?id=23787
Mailing List https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html
Third Party Advisory https://usn.ubuntu.com/4012-1/
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:2197
Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html
Mailing List https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html
Exploit https://sourceware.org/bugzilla/show_bug.cgi?id=23787
Mailing List https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html
Third Party Advisory https://usn.ubuntu.com/4012-1/
43
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 3/34 · Minimal
Exposure 16/34 · Moderate