CVE Vulnerabilities

CVE-2019-18807

Missing Release of Memory after Effective Lifetime

Published: Nov 07, 2019 | Modified: Aug 24, 2020
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
6.2 MODERATE
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
LOW

Two memory leaks in the sja1105_static_config_upload() function in drivers/net/dsa/sja1105/sja1105_spi.c in the Linux kernel before 5.3.5 allow attackers to cause a denial of service (memory consumption) by triggering static_config_buf_prepare_for_upload() or sja1105_inhibit_tx() failures, aka CID-68501df92d11.

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
Linux_kernel Linux * 5.3.5 (excluding)
Linux Ubuntu eoan *
Linux Ubuntu precise/esm *
Linux Ubuntu upstream *
Linux-aws Ubuntu eoan *
Linux-aws Ubuntu upstream *
Linux-aws-5.0 Ubuntu upstream *
Linux-aws-5.4 Ubuntu bionic *
Linux-aws-fips Ubuntu trusty *
Linux-aws-fips Ubuntu xenial *
Linux-aws-hwe Ubuntu upstream *
Linux-azure Ubuntu eoan *
Linux-azure Ubuntu upstream *
Linux-azure-4.15 Ubuntu bionic *
Linux-azure-5.3 Ubuntu upstream *
Linux-azure-5.4 Ubuntu bionic *
Linux-azure-edge Ubuntu bionic *
Linux-azure-edge Ubuntu esm-infra/bionic *
Linux-azure-edge Ubuntu upstream *
Linux-azure-fde Ubuntu focal *
Linux-azure-fips Ubuntu trusty *
Linux-azure-fips Ubuntu xenial *
Linux-gcp Ubuntu eoan *
Linux-gcp Ubuntu upstream *
Linux-gcp-4.15 Ubuntu bionic *
Linux-gcp-5.3 Ubuntu upstream *
Linux-gcp-5.4 Ubuntu bionic *
Linux-gcp-edge Ubuntu bionic *
Linux-gcp-edge Ubuntu esm-infra/bionic *
Linux-gcp-edge Ubuntu upstream *
Linux-gcp-fips Ubuntu trusty *
Linux-gcp-fips Ubuntu xenial *
Linux-gke Ubuntu focal *
Linux-gke Ubuntu xenial *
Linux-gke-4.15 Ubuntu upstream *
Linux-gke-5.0 Ubuntu upstream *
Linux-gke-5.3 Ubuntu upstream *
Linux-gkeop Ubuntu focal *
Linux-gkeop-5.15 Ubuntu focal *
Linux-hwe Ubuntu upstream *
Linux-hwe-5.4 Ubuntu bionic *
Linux-hwe-edge Ubuntu bionic *
Linux-hwe-edge Ubuntu esm-infra/bionic *
Linux-hwe-edge Ubuntu esm-infra/xenial *
Linux-hwe-edge Ubuntu upstream *
Linux-hwe-edge Ubuntu xenial *
Linux-ibm-5.4 Ubuntu bionic *
Linux-kvm Ubuntu eoan *
Linux-kvm Ubuntu upstream *
Linux-lts-trusty Ubuntu precise/esm *
Linux-lts-trusty Ubuntu upstream *
Linux-lts-xenial Ubuntu upstream *
Linux-oem Ubuntu upstream *
Linux-oem Ubuntu xenial *
Linux-oem-5.4 Ubuntu upstream *
Linux-oem-osp1 Ubuntu upstream *
Linux-oracle Ubuntu eoan *
Linux-oracle Ubuntu upstream *
Linux-oracle-5.0 Ubuntu upstream *
Linux-oracle-5.4 Ubuntu bionic *
Linux-raspi-5.4 Ubuntu bionic *
Linux-raspi2 Ubuntu eoan *
Linux-raspi2 Ubuntu focal *
Linux-raspi2 Ubuntu upstream *
Linux-raspi2-5.3 Ubuntu upstream *
Linux-realtime Ubuntu jammy *
Linux-riscv Ubuntu focal *
Linux-riscv Ubuntu jammy *
Linux-snapdragon Ubuntu upstream *

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