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.
Published 2018-12-03 14:29:00
Updated 2022-11-30 21:20:28
Source Red Hat, Inc.
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2018-16868

0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 16 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-16868

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.3
LOW AV:L/AC:M/Au:N/C:P/I:P/A:N
3.4
4.9
NIST
4.7
MEDIUM CVSS:3.0/AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
0.3
4.0
Red Hat, Inc.
5.6
MEDIUM CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
0.4
4.7
NIST

CWE ids for CVE-2018-16868

  • The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
    Assigned by:
    • nvd@nist.gov (Primary)
    • secalert@redhat.com (Secondary)

References for CVE-2018-16868

Products affected by CVE-2018-16868

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