CVE-2018-16868

gnutls: Bleichenbacher-like side channel leakage in PKCS#1 v1.5 verification and padding oracle verification

Published Dec 3, 2018 CVSS 3.1 · 5.6 Medium EPSS < 1% KEV · Not listed
Description
A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2018-8659 A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00109}

epss

{'score': 0.00098}

Type Values Removed Values Added
Metrics epss

{'score': 0.00089}

epss

{'score': 0.00109}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 5, 2024, 10:32 AM
Reserved
Sep 11, 2018, 12:00 AM
Status
Modified
Published
Dec 3, 2018, 2:29 PM
Modified
Jun 17, 2026, 1:44 AM
Severity
Moderate
Public date
Nov 30, 2018, 12:00 AM