PT-2017-8916 · Libtom+2 · Libtomcrypt+2

Sjaeckel · Published 2016-11-06 · Updated 2026-06-05 · CVE-2016-6129

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions LibTomCrypt versions prior to 2.2.0 OP-TEE versions prior to 2.2.0

Description The issue arises from the rsa verify hash ex function in rsa verify hash.c, which fails to validate that the message length matches the ASN.1 encoded data length. This oversight enables remote attackers to forge RSA signatures or public certificates by exploiting a Bleichenbacher signature forgery attack.

Recommendations For LibTomCrypt versions prior to 2.2.0, update to version 2.2.0 or later to resolve the issue. For OP-TEE versions prior to 2.2.0, update to version 2.2.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of the rsa verify hash ex function until a patch is available.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2018-1027

CVE-2016-6129

DLA-612-1

MGASA-2016-0369

Affected Products

Alt Linux

Libtomcrypt

Op-Tee

References · 17

• https://github.com/libtom/libtomcrypt/commit/5eb9743410ce4657e9d54fef26a2ee31a1b5dd0 · Patch
• https://osv.dev/vulnerability/MGASA-2016-0369 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1370955 · Patch
• https://osv.dev/vulnerability/CVE-2016-6129 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-6129 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-6129 · Security Note
• https://cve.org/CVERecord?id=CVE-2016-6129 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2016-6129 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-6129 · Vendor Advisory
• https://op-tee.org/advisories · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-6129 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2016-0369.html · Security Note
• https://github.com/OP-TEE/optee_os/commit/30d13250c390c4f56adefdcd3b64b7cc672f9fe2 · Note
• https://github.com/libtom/libtomcrypt/commit/5eb9743410ce4657e9d54fef26a2ee31a1b5dd09 · Note
• https://t.me/cveNotify/166279 · Telegram Post