Medium: gcc10-binutils

Issue Overview:

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. (CVE-2020-35448)

A flaw was found in binutils’ readelf program. An attacker who is able to convince a victim using readelf to read a crafted file, could trigger a stack buffer overflow, out-of-bounds write of arbitrary data supplied by the attacker. The highest impact of this flaw is to confidentiality, integrity, and availability. (CVE-2021-20294)

There’s a flaw in the BFD library of binutils. An attacker who supplies a crafted file to an application linked with BFD, and using the DWARF functionality, could cause an impact to system availability by way of excessive memory consumption. (CVE-2021-3487)

Affected Packages:

gcc10-binutils

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update gcc10-binutils to update your system.

New Packages:

aarch64:  
    gcc10-binutils-2.35-21.amzn2.0.1.aarch64  
    gcc10-binutils-devel-2.35-21.amzn2.0.1.aarch64  
    gcc10-binutils-gold-2.35-21.amzn2.0.1.aarch64  
    gcc10-binutils-debuginfo-2.35-21.amzn2.0.1.aarch64  
  
i686:  
    gcc10-binutils-2.35-21.amzn2.0.1.i686  
    gcc10-binutils-devel-2.35-21.amzn2.0.1.i686  
    gcc10-binutils-gold-2.35-21.amzn2.0.1.i686  
    gcc10-binutils-debuginfo-2.35-21.amzn2.0.1.i686  
  
src:  
    gcc10-binutils-2.35-21.amzn2.0.1.src  
  
x86_64:  
    gcc10-binutils-2.35-21.amzn2.0.1.x86_64  
    gcc10-binutils-devel-2.35-21.amzn2.0.1.x86_64  
    gcc10-binutils-gold-2.35-21.amzn2.0.1.x86_64  
    gcc10-binutils-debuginfo-2.35-21.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2020-35448, CVE-2021-20294, CVE-2021-3487

Mitre: CVE-2020-35448, CVE-2021-20294, CVE-2021-3487