Security readout for executives and security teams
Plain-English summary
CVE-2017-18247 is a crash bug in Libav 12.2 media handling. A crafted media file can trigger a NULL pointer dereference in audio FIFO sizing, causing denial of service for software that processes that file.
Executive priority
Treat this as a targeted availability risk, not a confirmed system compromise risk. Prioritize services that ingest external media and have customer-facing uptime requirements.
Technical view
The CVE describes av_audio_fifo_size in libavutil/audio_fifo.c in Libav 12.2 dereferencing a NULL pointer when handling crafted media. The documented impact is denial of service. The source bundle provides no CVSS score, CWE, named patch, or complete affected-product list.
Likely exposure
Exposure is most likely where Libav 12.2, or software bundling its libavutil code, processes untrusted media files. The provided affected-product metadata is incomplete, so inventory is required.
Exploitation context
The CVE states remote attackers can cause denial of service via a crafted media file. There is no KEV listing and no provided source evidence of active exploitation.
Researcher notes
Evidence is sparse. The CVE names Libav 12.2 and the vulnerable function, but the bundle lacks CVSS, CWE, detailed product mappings, exploit reports, and a named fixed release. Avoid broad claims beyond Libav-based media processing.
Mitigation direction
- Inventory systems and applications using Libav 12.2 or bundled libavutil code.
- Check Libav Bugzilla and vendor advisories for fixed versions or supported mitigation guidance.
- Reduce processing of untrusted media until exposure is understood.
- Run media-processing services with isolation, resource limits, and restart supervision.
- Monitor for crashes in Libav/libavutil media-processing paths.
Validation and detection
- Review SBOMs, package manifests, and embedded dependency records for Libav 12.2.
- Confirm whether exposed workflows process user-supplied or internet-delivered media files.
- Check crash logs for NULL dereference failures in audio_fifo or libavutil paths.
- Verify vendor-fixed or upgraded builds replace the vulnerable Libav component.
- Document remaining systems where affected version status cannot be proven.
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.
CVE-2017-18247 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.libav.org/show_bug.cgi?id=1089CVE reference · x_refsource_MISC
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.