CVE-2021-20284

binutils: Heap-based buffer overflow in _bfd_elf_slurp_secondary_reloc_section in elf.c

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in GNU Binutils 2.35.1, where there is a heap-based buffer overflow in _bfd_elf_slurp_secondary_reloc_section in elf.c due to the number of symbols not calculated correctly. The highest threat from this vulnerability is to system availability.

Se detectó un fallo en GNU Binutils versión 2.35.1, donde se presenta un desbordamiento de búfer en la región heap de la memoria en la función _bfd_elf_slurp_secondary_reloc_section en el archivo elf.c debido a que el número de símbolos no se calculó correctamente. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema.

The binutils packages provide a collection of binary utilities for the manipulation of object code in various object file formats. It includes the ar, as, gprof, ld, nm, objcopy, objdump, ranlib, readelf, size, strings, strip, and addr2line utilities. Issues addressed include a buffer overflow vulnerability.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2021-03-26 CVE Published
2024-08-03 CVE Updated
2024-08-03 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787: Out-of-bounds Write

CAPEC

References (5)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210521-0010	Third Party Advisory

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1937784	2024-08-03
https://sourceware.org/bugzilla/show_bug.cgi?id=26931	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202208-30	2023-02-12
https://access.redhat.com/security/cve/CVE-2021-20284	2021-11-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnu Search vendor "Gnu"		Binutils Search vendor "Gnu" for product "Binutils"				2.35.1 Search vendor "Gnu" for product "Binutils" and version "2.35.1"		-		Affected
Netapp Search vendor "Netapp"		Cloud Backup Search vendor "Netapp" for product "Cloud Backup"				-		-		Affected
Netapp Search vendor "Netapp"		Ontap Select Deploy Administration Utility Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility"				-		-		Affected