Security readout for executives and security teams
Plain-English summary
CVE-2022-42124 is a denial-of-service risk in Liferay Portal and Liferay DXP. A remote attacker could submit a crafted layout prototype name that causes excessive server resource consumption. The business impact is availability: affected portals may become slow or unavailable without data theft or integrity impact indicated by the CVSS vector.
Executive priority
Treat as a high-priority availability issue for exposed Liferay portals. It does not indicate data compromise, but outage risk can affect customers, employees, and revenue-facing workflows. Patch or update scheduling should be prompt for internet-facing deployments.
Technical view
The issue is a Regular Expression Denial of Service in LayoutPageTemplateEntryUpgradeProcess. It affects Liferay Portal 7.3.2 through 7.4.3.4, Liferay DXP 7.2 fix pack 9 through 18, DXP 7.3 before update 4, and DXP 7.4 GA. CVSS 3.1 is 7.5: network-accessible, low complexity, no privileges or user interaction, availability impact only.
Likely exposure
Organizations running the listed Liferay Portal or DXP versions are potentially exposed, especially internet-facing portals where layout prototype name input can be reached. The provided sources do not confirm exploitation in the wild.
Exploitation context
The vulnerability is remotely reachable and requires no privileges according to the CVSS vector. Exploitation centers on a crafted value in the layout prototype name field causing excessive resource use. CISA KEV status is false in the provided bundle.
Researcher notes
Evidence supports a ReDoS condition in a Liferay upgrade process tied to layout prototype names. The source bundle provides affected ranges and CVSS but no exploit-in-the-wild confirmation. Avoid assuming affected CPEs from the NVD-style affected field, which is listed as n/a in the bundle.
Mitigation direction
- Identify Liferay Portal and DXP versions in production and staging.
- Upgrade to a Liferay version outside the affected ranges per vendor guidance.
- Review the Liferay advisory and related issue records for applicable fix packs or updates.
- Prioritize internet-facing Liferay systems and business-critical portals.
- Monitor portal resource usage and availability until remediation is complete.
Validation and detection
- Confirm deployed versions against the affected version ranges.
- Check whether vendor-recommended updates or fix packs are installed.
- Review access paths to layout prototype name submission workflows.
- Look for unusual CPU exhaustion or availability events around Liferay portal activity.
- Document remaining affected instances and remediation owners.
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
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CWE-1333: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-42124 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
SSVC decision data
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/cve-2022-42124CVE reference, mitre
- https://issues.liferay.com/browse/LPE-17435CVE reference, mitre
- https://issues.liferay.com/browse/LPE-17535CVE reference, mitre
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.
Inefficient Regular Expression Complexity
Inefficient Regular Expression Complexity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.