CVE-2020-35448

binutils: Heap-based buffer overflow in bfd_getl_signed_32() in libbfd.c because sh_entsize is not validated in _bfd_elf_slurp_secondary_reloc_section() in elf.c

Severity Score

3.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.35.1. A heap-based buffer over-read can occur in bfd_getl_signed_32 in libbfd.c because sh_entsize is not validated in _bfd_elf_slurp_secondary_reloc_section in elf.c.

Se detectó un problema en la biblioteca Binary File Descriptor (BFD) (también se conoce como libbfd), distribuida en GNU Binutils versión 2.35.1. Una lectura excesiva de búfer en la región heap de la memoria puede ocurrir en la función bfd_getl_signed_32 en el archivo libbfd.c porque sh_entsize no está comprobado en la función _bfd_elf_slurp_secondary_reloc_section en el archivo elf.c

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-14 CVE Reserved
2020-12-27 CVE Published
2024-08-04 CVE Updated
2024-08-04 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-125: Out-of-bounds Read

CAPEC

References (6)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20210129-0008	Third Party Advisory
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git%3Bh=8642dafaef21aa6747cec01df1977e9c52eb4679	X_refsource_misc

URL	Date	SRC
https://sourceware.org/bugzilla/show_bug.cgi?id=26574	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202107-24	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-35448	2021-11-09
https://bugzilla.redhat.com/show_bug.cgi?id=1950478	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"		Ontap Select Deploy Administration Utility Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility"				-		-		Affected