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CVE-2018-18520

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Date: October 19, 2018

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.

Language: C

Severity Score

Related Resources (12)

https://usn.ubuntu.com/4012-1/
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-18520
https://security-tracker.debian.org/tracker/CVE-2018-18520
https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html
https://nvd.nist.gov/vuln/detail/CVE-2018-18520
https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html
https://access.redhat.com/errata/RHSA-2019:2197
https://access.redhat.com/security/cve/CVE-2018-18520
https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html
https://sourceware.org/bugzilla/show_bug.cgi?id=23787
https://www.mend.io/vulnerability-database/CVE-2018-18520

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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