In LibTomCrypt through 1.18.2, the der_decode_utf8_string function (in der_decode_utf8_string.c) does not properly detect certain invalid UTF-8 sequences. This allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) or read information from other memory locations via carefully crafted DER-encoded data.
CVE Status: Modified
Attribute | Value |
---|---|
Attack Complexity | LOW |
Attack Vector | NETWORK |
Availability Impact | HIGH |
Base Score | 9.1 |
Base Severity | CRITICAL |
Confidentiality Impact | HIGH |
Integrity Impact | NONE |
Privileges Required | NONE |
Scope | UNCHANGED |
User Interaction | NONE |
Vector String | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Exploitability Score | 3.9 |
Impact Score | 5.2 |
Source | [email protected] |
Type | Primary |