Vulnerability Monitor

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CVE-2016-6129

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.

Published

2017-02-13T18:59:00.660

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	op-tee	op-tee_os	≤ 2.1.0	Yes
Application	libtom	libtomcrypt	≤ 1.17	Yes

References

https://bugzilla.redhat.com/show_bug.cgi?id=1370955 Issue Tracking, Patch ([email protected])
https://github.com/libtom/libtomcrypt/commit/5eb9743410ce4657e9d54fef26a2ee31a1b5dd0 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://www.op-tee.org/advisories/ Vendor Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1370955 Issue Tracking, Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libtom/libtomcrypt/commit/5eb9743410ce4657e9d54fef26a2ee31a1b5dd0 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.op-tee.org/advisories/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)