SB2022081546 - Gentoo update for GNU Binutils

Description

This security bulletin contains information about 7 secuirty vulnerabilities.

1) UNIX symbolic link following (CVE-ID: CVE-2021-20197)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a symlink following issue within the ar, objcopy, strip, ranlib utilities wen writing output. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.

Successful exploitation of this vulnerability may result in privilege escalation.

2) Heap-based buffer overflow (CVE-ID: CVE-2021-20284)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the _bfd_elf_slurp_secondary_reloc_section() function in elf.c. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

3) Out-of-bounds write (CVE-ID: CVE-2021-20294)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in readelf. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

4) Input validation error (CVE-ID: CVE-2021-3487)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the BFD library in binutils. A remote attacker who supplies a crafted file to an application linked with BFD can use the DWARF functionality to perform a denial of service (DoS) attack.

5) Uncontrolled Recursion (CVE-ID: CVE-2021-3530)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to uncontrolled recursion within the demangle_path() function in rust-demangle.c in GNU libiberty. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

6) Out-of-bounds write (CVE-ID: CVE-2021-3549)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error in the objdump utility. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger an out-of-bounds write by passing a large section to avr_elf32_load_records_from_section() function and execute arbitrary code on the target system.

7) Out-of-bounds write (CVE-ID: CVE-2021-45078)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a boundary error in stab_xcoff_builtin_type() function in stabs.c. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Note, the vulnerability exists due to incorrect patch for #VU13471 (CVE-2018-12699).

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/glsa/202208-30