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TI-2017-01876 Aliases CVE-2017-2625GHSA-cvmx-9h9q-8hmw

It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate…

Priority LOW 30CWE-331Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 8 fixed, 2 without a fix

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and Red Hat.

Summary

It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.

Why it matters now

EPSS 0.00534 45th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 8 fixed, 2 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
XorglibXdmcp1.1.2—No fix listedCNA
  • libXdmcp VendorXorg Affected 1.1.2 Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:x.org:libxdmcp:*:*:*:*:*:*:*:*before 1.1.2Vulnerablex.org
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:x.org:libxdmcp:*:*:*:*:*:*:*:* Versions before 1.1.2 Vulnerable ·x.org
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 1 advisory

  • RHSA-2017:1865 Released 2017-08-01 · Red Hat rating Moderate
    X.org X11 libraries security, bug fix and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) libICE-1.0.9-9.el7, libX11-1.6.5-1.el7, libX11-common-1.6.5-1.el7 +38
    • Red Hat Enterprise Linux Client Optional (v. 7) drm-utils-2.4.74-1.el7, libICE-devel-1.0.9-9.el7, libX11-devel-1.6.5-1.el7 +44
    • Red Hat Enterprise Linux ComputeNode (v. 7) libICE-1.0.9-9.el7, libX11-1.6.5-1.el7, libX11-common-1.6.5-1.el7 +29
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) drm-utils-2.4.74-1.el7, libICE-devel-1.0.9-9.el7, libX11-devel-1.6.5-1.el7 +46
    • Red Hat Enterprise Linux Server (v. 7) libICE-1.0.9-9.el7, libICE-1.0.9-9.el7.ppc, libICE-devel-1.0.9-9.el7 +47
    • Red Hat Enterprise Linux Server Optional (v. 7) drm-utils-2.4.74-1.el7, libXdmcp-devel-1.1.2-6.el7, libXdmcp-devel-1.1.2-6.el7.ppc +42
    • Red Hat Enterprise Linux Workstation (v. 7) libICE-1.0.9-9.el7, libICE-devel-1.0.9-9.el7, libX11-1.6.5-1.el7 +47
    • Red Hat Enterprise Linux Workstation Optional (v. 7) drm-utils-2.4.74-1.el7, libXdmcp-devel-1.1.2-6.el7, libXfont-devel-1.5.2-1.el7 +24

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2017:1865
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:1865
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2017:1865
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2017:1865
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:1865
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2017:1865
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:1865
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2017:1865

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-2625
  2. 2026-10-03 Alias added: GHSA-cvmx-9h9q-8hmw

References

Exploit 1

Advisory 4

Other 1

  • TI-2008-02265 Integer overflow in the ProcRenderCreateCursor function in the Render extension in the X… CVSS 2.0MEDIUM 6.8
  • TI-2017-01875 Information disclosure in xorg-x11-server CVSS 3.0HIGH 7.0
  • TI-2017-01877 It was discovered that libICE before 1.0.9-8 used a weak entropy to generate keys. CVSS 3.0MEDIUM 5.5

Sources

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