Vulnerability Details : CVE-2018-18520

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.

Vulnerability category: OverflowDenial of service

Published 2018-10-19 17:29:01

Updated 2021-11-30 21:59:46

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2018-18520

Probability of exploitation activity in the next 30 days: 0.28%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 64 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2018-18520

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:N/A:P	8.6	2.9	[email protected]
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	2.8	3.6	[email protected]
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2018-18520

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.

Assigned by: [email protected] (Primary)

References for CVE-2018-18520

https://access.redhat.com/errata/RHSA-2019:2197

Third Party Advisory

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html

Mailing List;Third Party Advisory

CVEs referencing this url
https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html

Mailing List;Patch;Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=23787

Exploit;Issue Tracking;Third Party Advisory
https://usn.ubuntu.com/4012-1/

Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html

Mailing List;Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html

Mailing List;Third Party Advisory

CVEs referencing this url

Products affected by CVE-2018-18520

Debian » Debian Linux » Version: 8.0
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Redhat » Enterprise Linux Desktop » Version: 7.0
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
Matching versions
Redhat » Enterprise Linux Server » Version: 7.0
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
Matching versions
Redhat » Enterprise Linux Workstation » Version: 7.0
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.10
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Matching versions
Opensuse » Leap » Version: 15.0
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
Matching versions
Opensuse » Leap » Version: 15.1
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
Matching versions
Elfutils Project » Elfutils
Versions up to, including, (<=) 0.174
cpe:2.3:a:elfutils_project:elfutils:*:*:*:*:*:*:*:*
Matching versions