Vulnerability in GNU Gnutls
CVE-2018-16868
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 · last modified .
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/106080 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html (vendor-advisory, Mailing List, Third Party Advisory, Broken Link)
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00068.html (vendor-advisory, Mailing List, Third Party Advisory, Broken Link)
- cat.eyalro.net/ (Technical Description, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2018-16868?
- CVE-2018-16868 is a medium-severity vulnerability in GNU Gnutls, classified under Observable Discrepancy. CVSS score: 5.6/10. Published 2018-12-03.
- How severe is CVE-2018-16868?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2018-16868 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.