CVE Vulnerabilities

CVE-2020-15806

Missing Release of Memory after Effective Lifetime

Published: Jul 22, 2020 | Modified: Jul 21, 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

CODESYS Control runtime system before 3.5.16.10 allows Uncontrolled Memory Allocation.

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
Control_for_beaglebone Codesys * 3.5.16.10 (excluding)
Control_for_empc-a/imx6 Codesys * 3.5.16.10 (excluding)
Control_for_iot2000 Codesys * 3.5.16.10 (excluding)
Control_for_linux Codesys * 3.5.16.10 (excluding)
Control_for_pfc100 Codesys * 3.5.16.10 (excluding)
Control_for_pfc200 Codesys * 3.5.16.10 (excluding)
Control_for_plcnext Codesys * 3.5.16.10 (excluding)
Control_for_raspberry_pi Codesys * 3.5.16.10 (excluding)
Control_for_wago_touch_panels_600 Codesys * 3.5.16.10 (excluding)
Control_rte Codesys 3.5.8.60 (including) 3.5.16.10 (excluding)
Control_runtime_system_toolkit Codesys 3.0 (including) 3.5.16.10 (excluding)
Control_win Codesys 3.5.9.80 (including) 3.5.16.10 (excluding)
Embedded_target_visu_toolkit Codesys 3.0 (including) 3.5.16.10 (excluding)
Hmi Codesys 3.5.10.0 (including) 3.5.16.10 (excluding)
Remote_target_visu_toolkit Codesys 3.0 (including) 3.5.16.10 (excluding)
Simulation_runtime Codesys 3.5.9.40 (including) 3.5.16.10 (excluding)

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