CVE Vulnerabilities

CVE-2020-25795

Missing Release of Memory after Effective Lifetime

Published: Sep 19, 2020 | Modified: Jan 12, 2021
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

An issue was discovered in the sized-chunks crate through 0.6.2 for Rust. In the Chunk implementation, insert_from can have a memory-safety issue upon a panic.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

Affected Software

Name Vendor Start Version End Version
Sized-chunks Sized-chunks_project * 0.6.2 (including)
Rust-sized-chunks Ubuntu groovy *
Rust-sized-chunks Ubuntu hirsute *
Rust-sized-chunks Ubuntu impish *
Rust-sized-chunks Ubuntu kinetic *
Rust-sized-chunks Ubuntu lunar *
Rust-sized-chunks Ubuntu mantic *
Rust-sized-chunks Ubuntu trusty *

Potential Mitigations

  • Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
  • For example, glibc in Linux provides protection against free of invalid pointers.
  • When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
  • To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.

References