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CVE-2016-6129

24
FAUCET Score

CVE-2016-6129 describes a critical vulnerability in the rsa_verify_hash_ex function within LibTomCrypt, specifically affecting OP-TEE versions prior to 2.2.0. This flaw allows remote attackers to forge RSA signatures or public certificates due to improper validation of message length against ASN.1 encoded data length, enabling a Bleichenbacher signature forgery attack. With a CVSS score of 7.5 (High), this vulnerability presents a significant risk to integrity, requiring no user interaction or complex attack conditions. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.2.0CPE matchmatch criteria
cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*
<= 1.17CPE matchmatch criteria
cpe:2.3:a:libtom:libtomcrypt:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.78%
Probability of exploitation in next 30 days
EPSS Percentile
52.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 28th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-6129Moderate

libtomcrypt: possible OP-TEE Bleichenbacher attack

Aug 26, 2016

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatch
github.com / libtom/libtomcrypt/commit/5eb9743410ce4657e9d54fef26a2ee31a1b5dd0
Issue TrackingPatchThird Party Advisory
op-tee.org / advisories
Vendor Advisory