Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Network
0

CVE-2023-27477

Disclosure Date: March 08, 2023 •
CVE-2023-27477 CVSS v3 Base Score: 4.3
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

wasmtime is a fast and secure runtime for WebAssembly. Wasmtime’s code generation backend, Cranelift, has a bug on x86_64 platforms for the WebAssembly i8x16.select instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indices are greater than 16. There is an off-by-one error in the calculation of the mask to the pshufb instruction which causes incorrect results to be returned if lanes are selected from the second vector. This codegen bug has been fixed in Wasmtiem 6.0.1, 5.0.1, and 4.0.1. Users are recommended to upgrade to these updated versions. If upgrading is not an option for you at this time, you can avoid this miscompilation by disabling the Wasm simd proposal. Additionally the bug is only present on x86_64 hosts. Other platforms such as AArch64 and s390x are not affected.

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CVSS V3 Severity and Metrics
Base Score:
4.3 Medium
Impact Score:
1.4
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
Low
Availability (A):
None

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
wasmtime cranelift-codegen: >= 0.88.0, < 0.91.1
wasmtime cranelift-codegen: >= 0.92.0, < 0.92.1
wasmtime cranelift-codegen: >= 0.93.0, < 0.93.1
wasmtime wasmtime: >= 0.37.0, < 4.0.1
wasmtime wasmtime: >= 5.0.0, < 5.0.1
wasmtime wasmtime: >= 6.0.0, < 6.0.1
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown
Technical Analysis