CVE-2018-20781: canonical ubuntu_linux Insufficiently Protected Credentials
CVSS: 7.8v3.1HighModified
AliasesMGASA-2019-0111UBUNTU-CVE-2018-20781USN-3894-1DEBIAN-CVE-2018-20781
Published 12-02-2019Last modified 05-08-2024
Vulnerability summary
CVE-2018-20781 is a high (CVSS 7.8) Insufficiently Protected Credentials vulnerability in canonical ubuntu_linux. EPSS estimates a 1.54% chance of exploitation in the next 30 days, higher than 74.5% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
1.54%
0%100%
Low · +0.06 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1metasploit
Timeline
- 12-02-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In pam/gkr-pam-module.c in GNOME Keyring before 3.27.2, the user's password is kept in a session-child process spawned from the LightDM daemon. This can expose the credential in cleartext.
CVSS metrics
5 scores · 3 sources · 3 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
High 7.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
1.54%
Chance of exploitation in the next 30 days
Percentile
75%
Versus all other CVEs
30-day change
+0.06 pp
From 1.48% on 18-09-2026
18-09-202618-10-2026
EPSS score1.54%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundMimiPenguin
post/linux/gather/mimipenguin
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04
Debian1 product
- gnome-keyring< 3.28.0-1
Gnome1 product
- gnome_keyring< 3.27.2
Mageia1 product
- gnome-keyring< 3.20.0-1.1.mga6
Oracle1 product
Ubuntu1 product
- gnome-keyring< 3.10.1-1ubuntu4.4 | < 3.18.3-0ubuntu2.1
6 vendors · 6 products
References
14 links- bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/1772919X Refsource MISCIssue TrackingPatchThird Party Advisory
- github.com/huntergregal/mimipenguin/tree/d95f1e08ce79783794f38433bbf7de5abd9792daX Refsource MISCThird Party Advisory
