CVE-2019-17362 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00020.html http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00041.html https://github.com/libtom/libtomcrypt/issues/507 https://github.com/libtom/libtomcrypt/pull/508 https://lists.debian.org/debian-lts-announce/2019/10/msg00010.html https://vuldb.com/?id.142995

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

9.1