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CVE-2021-42574

Public on 2021-11-01
Modified on 2023-01-18
Description

A flaw was found in the way Unicode standards are implemented in the context of development environments, which have specialized requirements for rendering text. An attacker could exploit this to deceive a human reviewer by creating a malicious patch containing well placed BiDi characters. The special handling and rendering of those characters can be then used in an attempt to hide unexpected and potentially dangerous behaviour from the reviewer.

Severity
Medium
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CVSS v3 Base Score
8.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core gcc 2022-04-25 22:57 ALAS2-2022-1784
Amazon Linux 2023 gcc 2023-02-17 20:44 ALAS2023-2023-030
Amazon Linux 2 - Core gcc10 2022-04-25 22:57 ALAS2-2022-1784

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD CVSSv2 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P
NVD CVSSv3 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

References

Red Hat: CVE-2021-42574 Mitre: CVE-2021-42574 FAQs regarding Amazon Linux ALAS/CVE Severity