CVE-2019-17362

critical

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.

References

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

Details

Source: MITRE

Published: 2019-10-09

Updated: 2019-11-09

Type: CWE-125

Risk Information

CVSS v2

Base Score: 6.4

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P

Impact Score: 4.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 9.1

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

Impact Score: 5.2

Exploitability Score: 3.9

Severity: CRITICAL