CVE-2018-10846: canonical ubuntu_linux Covert Timing Channel
CVSS: 5.6v3.1MediumModified
AliasesUBUNTU-CVE-2018-10846DEBIAN-CVE-2018-10846
Published 22-08-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-10846 is a medium (CVSS 5.6) Covert Timing Channel vulnerability in canonical ubuntu_linux. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.3% of scored vulnerabilities.
CVSS score
5.6/10
010
Medium · v3.1 (NVD)EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 10 · Related 7Timeline
- 22-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.
CVSS metrics
7 scores · 4 sources · 3 versionsMedium 5.6Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.6MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.6MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Medium 5.3Preferred score · CVE.org (CNA)
CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:NSourcesAll 3 agree
- NVDNIST5.3MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
Low 1.9Preferred score · NVD (NIST)
AV:L/AC:M/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
0.39%
Chance of exploitation in the next 30 days
Percentile
31%
Versus all other CVEs
30-day change
0.00 pp
From 0.39% on 18-09-2026
18-09-202618-10-2026
EPSS score0.39%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-385Covert Timing ChannelCovert timing channels convey information by modulating some aspect of system behavior over time, so that the program receiving the information can observe system behavior and infer protected information.
- CWE-327Use of a Broken or Risky Cryptographic AlgorithmThe product uses a broken or risky cryptographic algorithm or protocol.
Affected systems
Redhat3 products
Debian2 products
- gnutls28< 3.5.19-1
- debian_linuxEOL8.0
Ubuntu2 products
- gnutls26All versions (No fix recorded)
- gnutls28< 3.4.10-4ubuntu1.5 | < 3.5.18-1ubuntu1.1
[unknown]1 product
- gnutlsn/a
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 18.10 | 19.04
Fedoraproject1 product
- fedoraEOL31 | 32
Gnu1 product
- gnutls< 3.6.12
7 vendors · 11 products
References
14 links- gitlab.com/gnutls/gnutls/merge_requests/657X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10846X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2018/10/msg00022.htmlMailing ListX Refsource MLISTThird Party Advisory