CVE-2016-6129
Public on 2017-02-13
Modified on 2017-08-04
Description
The rsa_verify_hash_ex function in rsa_verify_hash.c in LibTomCrypt, as used in OP-TEE before 2.2.0, does not validate that the message length is equal to the ASN.1 encoded data length, which makes it easier for remote attackers to forge RSA signatures or public certificates by leveraging a Bleichenbacher signature forgery attack.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | libtomcrypt | 2017-08-03 | ALAS-2017-864 | Fixed |
| Amazon Linux 1 | libtommath | 2017-08-03 | ALAS-2017-864 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv2 | 4.0 | AV:N/AC:H/Au:N/C:P/I:P/A:N |
| Amazon Linux | CVSSv3 | 4.8 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | CVSSv2 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| NVD | CVSSv3 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |