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CVE-2020-21047

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Date: August 22, 2023

The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.

Language: C

Severity Score

Related Resources (8)

https://sourceware.org/bugzilla/show_bug.cgi?id=25068
https://nvd.nist.gov/vuln/detail/CVE-2020-21047
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-21047
https://lists.debian.org/debian-lts-announce/2023/09/msg00026.html
https://sourceware.org/git/?p=elfutils.git%3Ba=commitdiff%3Bh=99dc63b10b3878616b85df2dfd2e4e7103e414b8
https://sourceware.org/git/?p=elfutils.git;a=commitdiff;h=99dc63b10b3878616b85df2dfd2e4e7103e414b8
https://security-tracker.debian.org/tracker/CVE-2020-21047
https://www.mend.io/vulnerability-database/CVE-2020-21047

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Top Fix

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Upgrade Version

Upgrade to version elfutils-0.178 ,dts-0.178

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CVSS v3.1

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

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