CVE-2021-42574
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- CVE-2021-42574
CVE Details
| Release Date: | 2021-11-01 |
Description
An issue was discovered in the Bidirectional Algorithm in the Unicode Specification through 14.0. It permits the visual reordering of characters via control sequences, which can be used to craft source code that renders different logic than the logical ordering of tokens ingested by compilers and interpreters. Adversaries can leverage this to encode source code for compilers accepting Unicode such that targeted vulnerabilities are introduced invisibly to human reviewers.
See more information about CVE-2021-42574 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 8.3 | Base Metrics: | AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |
| Access Vector: | Network | Attack Complexity: | High |
| Privileges Required: | None | User Interaction: | Required |
| Scope: | Changed | Confidentiality Impact: | High |
| Integrity Impact: | High | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 7 (binutils) | ELSA-2021-4033 | 2021-11-02 |
| Oracle Linux version 8 (annobin) | ELSA-2021-4593 | 2021-11-18 |
| Oracle Linux version 8 (binutils) | ELSA-2021-4595 | 2021-11-18 |
| Oracle Linux version 8 (clang) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (compiler-rt) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (gcc) | ELSA-2021-4587 | 2021-11-18 |
| Oracle Linux version 8 (gcc-toolset-10-annobin) | ELSA-2021-4592 | 2021-11-18 |
| Oracle Linux version 8 (gcc-toolset-10-binutils) | ELSA-2021-4649 | 2021-11-18 |
| Oracle Linux version 8 (gcc-toolset-10-gcc) | ELSA-2021-4585 | 2021-11-19 |
| Oracle Linux version 8 (gcc-toolset-11-annobin) | ELSA-2021-4591 | 2021-11-18 |
| Oracle Linux version 8 (gcc-toolset-11-binutils) | ELSA-2021-4594 | 2021-11-18 |
| Oracle Linux version 8 (gcc-toolset-11-gcc) | ELSA-2021-4586 | 2021-11-18 |
| Oracle Linux version 8 (libomp) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (lld) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (lldb) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (llvm) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (llvm-toolset) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (python-lit) | ELSA-2021-4743 | 2021-11-19 |
| Oracle Linux version 8 (rust) | ELSA-2021-4590 | 2021-11-18 |
| Oracle Linux version 8 (rust-toolset) | ELSA-2021-4590 | 2021-11-18 |
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