CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
AI Score
Confidence
Low
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
vmm-sys-util is a collection of modules that provides helpers and utilities used by multiple rust-vmm components. Starting in version 0.5.0 and prior to version 0.12.0, an issue in the FamStructWrapper::deserialize
implementation provided by the crate for vmm_sys_util::fam::FamStructWrapper
can lead to out of bounds memory accesses. The deserialization does not check that the length stored in the header matches the flexible array length. Mismatch in the lengths might allow out of bounds memory access through Rust-safe methods. The issue was corrected in version 0.12.0 by inserting a check that verifies the lengths of compared flexible arrays are equal for any deserialized header and aborting deserialization otherwise. Moreover, the API was changed so that header length can only be modified through Rust-unsafe code. This ensures that users cannot trigger out-of-bounds memory access from Rust-safe code.
github.com/rust-vmm/vmm-sys-util/commit/30172fca2a8e0a38667d934ee56682247e13f167
github.com/rust-vmm/vmm-sys-util/security/advisories/GHSA-875g-mfp6-g7f9
lists.fedoraproject.org/archives/list/[email protected]/message/W5XMCLV2P3ANS3XN4NXZTV4PUNTLWUNJ/
lists.fedoraproject.org/archives/list/[email protected]/message/YJI7D273R6G5RUC246KTI2YY3AXZKZMD/
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
AI Score
Confidence
Low
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial