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    CVE-2018-20781

    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.

    Published:Apr 19, 2017
    Last Modified:Nov 21, 2024
    EPS:Feb 12, 2019
    EPSS Score:0.06715
    CVSS Score:7.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Gnome
    Product
    Gnome Keyring
    Vendor
    Oracle
    Product
    Zfs Storage Appliance Kit

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
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    References

    https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/1772919
    https://bugzilla.gnome.org/show_bug.cgi?id=781486
    https://github.com/huntergregal/mimipenguin
    https://github.com/huntergregal/mimipenguin/tree/d95f1e08ce79783794f38433bbf7de5abd9792da
    https://gitlab.gnome.org/GNOME/gnome-keyring/issues/3
    https://gitlab.gnome.org/GNOME/gnome-keyring/tags/3.27.2
    https://usn.ubuntu.com/3894-1/
    https://www.oracle.com/security-alerts/cpujan2021.html
    https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/1772919
    https://bugzilla.gnome.org/show_bug.cgi?id=781486
    https://github.com/huntergregal/mimipenguin
    https://github.com/huntergregal/mimipenguin/tree/d95f1e08ce79783794f38433bbf7de5abd9792da
    https://gitlab.gnome.org/GNOME/gnome-keyring/issues/3
    https://gitlab.gnome.org/GNOME/gnome-keyring/tags/3.27.2
    https://usn.ubuntu.com/3894-1/
    https://www.oracle.com/security-alerts/cpujan2021.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High