Security readout for executives and security teams
Plain-English summary
CVE-2017-2626 is a weakness in Xorg libICE where session keys were generated with insufficient randomness. A local user could potentially use information visible in the process list to hijack another X session. This is not a remote internet-facing bug, but it matters on shared Linux desktops or systems with untrusted local users.
Executive priority
Treat this as a moderate hygiene and shared-system risk. It is unlikely to justify emergency response for internet-facing exposure, but vulnerable multi-user desktops or administrative hosts should be patched promptly through standard security update workflows.
Technical view
libICE before the fixed 1.0.9-8 package used weak entropy for key generation, mapped to CWE-331. The published CVSS 3.0 score is 5.2 with local attack vector, low complexity, low privileges, no user interaction, changed scope, low confidentiality impact, and low availability impact.
Likely exposure
Likely exposure is limited to systems running vulnerable Xorg libICE packages, especially shared Linux or Unix-like systems where local users can inspect process information. Systems without libICE/X11 components, or those updated through vendor security advisories, are less likely exposed.
Exploitation context
The source bundle supports only potential local exploitation. It describes session hijacking using information available from the process list. CISA KEV is false, and the provided sources do not show confirmed active exploitation or public weaponization.
Researcher notes
Evidence is strongest for weak entropy in libICE key generation and local session-hijacking potential. The bundle does not provide exploit details, active exploitation evidence, or universal remediation beyond vendor updates. Validate per distribution because fixed package naming may differ.
Mitigation direction
- Update libICE using the relevant distribution security advisory or vendor package channel.
- Prioritize shared workstations, jump boxes, and multi-user systems with X11 components installed.
- Check vendor guidance before applying compensating controls not named in advisories.
- Reduce unnecessary local user access on systems that still require vulnerable packages.
Validation and detection
- Inventory installed libICE package versions across Linux and Unix-like hosts.
- Compare package versions against vendor advisories for Gentoo, Red Hat, Debian, and upstream Xorg.
- Identify shared systems where untrusted local users can run processes.
- Confirm patched systems received the vendor-fixed libICE package, not only an application restart.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-331: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2017-2626 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.2 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L22.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.2MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://cgit.freedesktop.org/xorg/lib/libICE/commit/?id=ff5e59f32255913bb1cdf51441b98c9107ae165bCVE reference · x_refsource_CONFIRM
- GLSA-201704-03CVE reference · vendor-advisory, x_refsource_GENTOO
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2626CVE reference · x_refsource_CONFIRM
- RHSA-2017:1865CVE reference · vendor-advisory, x_refsource_REDHAT
- https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/CVE reference · x_refsource_MISC
- [debian-lts-announce] 20191123 [SECURITY] [DLA 2002-1] libice security updateCVE reference · mailing-list, x_refsource_MLIST
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Entropy
Insufficient Entropy represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.