Bug 1758975 (CVE-2019-16910) - CVE-2019-16910 mbedtls: use of RNG with insufficient entropy allows to recover private key vise side-channel attack
Summary: CVE-2019-16910 mbedtls: use of RNG with insufficient entropy allows to recove...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2019-16910
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1758976 1758977
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-10-07 05:51 UTC by Dhananjay Arunesh
Modified: 2019-10-07 06:51 UTC (History)
2 users (show)

Fixed In Version: mbedtls 2.19.0
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Clone Of:
Environment:
Last Closed: 2019-10-07 06:51:05 UTC


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Description Dhananjay Arunesh 2019-10-07 05:51:33 UTC
Arm Mbed TLS before 2.19.0 and Arm Mbed Crypto before 2.0.0, when deterministic ECDSA is enabled, use an RNG with insufficient entropy for blinding, which might allow an attacker to recover a private key via side-channel attacks if a victim signs the same message many times. (For Mbed TLS, the fix is also available in versions 2.7.12 and 2.16.3.)

Reference:
https://github.com/ARMmbed/mbedtls/commit/298a43a77ec0ed2c19a8c924ddd8571ef3e65dfd
https://github.com/ARMmbed/mbedtls/commit/33f66ba6fd234114aa37f0209dac031bb2870a9b
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEHHH2DOBXB25CAU3Q6E66X723VAYTB5/
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-10

Comment 1 Dhananjay Arunesh 2019-10-07 05:52:06 UTC
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 1758977]
Affects: fedora-all [bug 1758976]

Comment 2 Product Security DevOps Team 2019-10-07 06:51:05 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.


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