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CVE Record

CVE-2020-25467: A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an att...

A null pointer dereference was discovered lzo_decompress_buf in stream.c in Irzip 0.621 which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-25467 is a denial-of-service flaw in lrzip 0.621. A specially crafted compressed file can trigger a null pointer dereference during decompression, causing the process to crash. The main business concern is service interruption where lrzip handles files from external or untrusted sources.

Executive priority

Treat as a targeted operational resilience issue, not a broad compromise event. Prioritize environments that automatically unpack outside files, because a crash could disrupt business workflows or file-processing services.

Technical view

The issue is reported in lzo_decompress_buf in stream.c in lrzip 0.621. The CVE description ties the failure mode to null pointer dereference during processing of a crafted compressed file. The provided sources do not include CVSS, CWE mapping, or detailed affected package ranges.

Likely exposure

Exposure is most likely on systems where lrzip is installed and used to decompress files received from users, partners, email, archives, or automated ingestion pipelines. General systems with lrzip installed but not processing untrusted compressed files have lower practical exposure.

Exploitation context

The source bundle does not show active exploitation, and the CVE is not marked KEV. The cited condition is processing a crafted compressed file. No source supports remote code execution, privilege escalation, or data theft claims.

Researcher notes

The public bundle is thin: CVSS, CWE, complete affected CPEs, and detailed fixed-version data are absent. Debian published an LTS security update, and upstream/Ubuntu issue links provide corroboration. Avoid extending impact beyond denial of service without additional evidence.

Mitigation direction

  • Inventory systems and workflows that install or invoke lrzip.
  • Apply vendor or distribution lrzip security updates where available.
  • Avoid processing untrusted compressed files with vulnerable lrzip versions.
  • Isolate archive-processing jobs from critical services and shared infrastructure.
  • Check Ubuntu, Debian, and upstream lrzip guidance for fixed package status.

Validation and detection

  • Confirm whether lrzip is installed on servers, workstations, and build images.
  • Identify automation that decompresses externally supplied archives.
  • Check package versions against vendor advisories and fixed distribution packages.
  • Review logs for lrzip crashes during archive processing.
  • Document whether compensating isolation controls exist for file-processing workflows.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

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CVE-2020-25467 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.