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TI-2020-09707 Aliases CVE-2020-12049

An issue was discovered in dbus >= 1.3.0 before 1.12.18.

Priority LOW 26CWE-404Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-404.

Summary

An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.

Why it matters now

EPSS 0.00569 47th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed Red Hat: 4 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*1.3.0 to before 1.12.18VulnerableFreedesktop
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:*:*:*:*12.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*19.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*20.04VulnerableCanonical
  • cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:* Versions 1.3.0 to before 1.12.18 Vulnerable ·Freedesktop
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:*:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* Versions 19.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical

Remediation

Red Hat 4 advisories

  • RHSA-2020:3298 Released 2020-08-04 · Red Hat rating Important
    dbus security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) dbus-devel-1:1.12.8-10.el8_1, dbus-x11-1:1.12.8-10.el8_1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) dbus-1:1.12.8-10.el8_1, dbus-common-1:1.12.8-10.el8_1, dbus-daemon-1:1.12.8-10.el8_1 +2
  • RHSA-2020:3044 Released 2020-07-21 · Red Hat rating Important
    dbus security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.0) dbus-devel-1:1.12.8-8.el8_0, dbus-x11-1:1.12.8-8.el8_0
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.0) dbus-1:1.12.8-8.el8_0, dbus-common-1:1.12.8-8.el8_0, dbus-daemon-1:1.12.8-8.el8_0 +2
  • RHSA-2020:3014 Released 2020-07-21 · Red Hat rating Important
    dbus security update
    • Red Hat Enterprise Linux AppStream (v. 8) dbus-devel-1:1.12.8-10.el8_2, dbus-x11-1:1.12.8-10.el8_2
    • Red Hat Enterprise Linux BaseOS (v. 8) dbus-1:1.12.8-10.el8_2, dbus-common-1:1.12.8-10.el8_2, dbus-daemon-1:1.12.8-10.el8_2 +2
Show 1 more Red Hat advisories
  • RHSA-2020:2894 Released 2020-07-13 · Red Hat rating Important
    dbus security update
    • Red Hat Enterprise Linux Client (v. 7) dbus-1:1.10.24-14.el7_8, dbus-libs-1:1.10.24-14.el7_8, dbus-x11-1:1.10.24-14.el7_8
    • Red Hat Enterprise Linux Client Optional (v. 7) dbus-devel-1:1.10.24-14.el7_8, dbus-doc-1:1.10.24-14.el7_8, dbus-tests-1:1.10.24-14.el7_8
    • Red Hat Enterprise Linux ComputeNode (v. 7) dbus-1:1.10.24-14.el7_8, dbus-libs-1:1.10.24-14.el7_8, dbus-x11-1:1.10.24-14.el7_8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) dbus-devel-1:1.10.24-14.el7_8, dbus-doc-1:1.10.24-14.el7_8, dbus-tests-1:1.10.24-14.el7_8
    • Red Hat Enterprise Linux Server (v. 7) dbus-1:1.10.24-14.el7_8, dbus-devel-1:1.10.24-14.el7_8, dbus-devel-1:1.10.24-14.el7_8.ppc +3
    • Red Hat Enterprise Linux Server Optional (v. 7) dbus-doc-1:1.10.24-14.el7_8, dbus-tests-1:1.10.24-14.el7_8
    • Red Hat Enterprise Linux Workstation (v. 7) dbus-1:1.10.24-14.el7_8, dbus-devel-1:1.10.24-14.el7_8, dbus-libs-1:1.10.24-14.el7_8 +1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) dbus-doc-1:1.10.24-14.el7_8, dbus-tests-1:1.10.24-14.el7_8

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:3014
Red Hat Enterprise Linux AppStream E4S (v. 8.0)Fixed RHSA-2020:3044
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2020:3298
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:3014
Red Hat Enterprise Linux BaseOS E4S (v. 8.0)Fixed RHSA-2020:3044
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2020:3298
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:2894
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:2894
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:2894
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:2894
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:2894
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:2894
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:2894
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:2894
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-12049

References

Exploit 2

Patch 1

Advisory 6

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences