Security readout for executives and security teams
Plain-English summary
CVE-2019-14443 is a crash bug in Libav 12.3. A remote party could supply media that triggers a division-by-zero condition during decoding, causing an application such as avconv to terminate. The known impact is denial of service, not data theft or code execution based on the supplied sources.
Executive priority
Treat as a service resilience issue. Prioritize exposed media-processing services because a crash can interrupt uploads, conversion pipelines, or automated analysis, but the supplied evidence does not support emergency handling for active exploitation or code execution.
Technical view
The issue is a division by zero in range_decode_culshift in libavcodec/apedec.c in Libav 12.3. The CVE description states remote attackers can cause an application crash, demonstrated with avconv. No CVSS vector, CWE, or KEV listing is provided in the source bundle.
Likely exposure
Exposure is most likely where Libav 12.3, or distro packages based on it, process untrusted media files in user-facing upload, conversion, preview, or scanning workflows.
Exploitation context
The sources describe remote denial of service through an application crash. They do not report active exploitation, KEV listing, public weaponization, privilege escalation, or code execution.
Researcher notes
Evidence is sparse: the CVE record names Libav 12.3, the crashing function, and avconv demonstration; Debian published a security update. The bundle does not include CVSS, affected CPEs, exact fixed upstream commit, exploit maturity, or broader downstream product impact.
Mitigation direction
- Apply the Debian LTS libav security update where applicable.
- For non-Debian builds, check Libav or vendor package guidance for fixed versions.
- Avoid processing untrusted media with affected Libav builds until updated.
- Run media conversion services with process isolation and restart supervision.
Validation and detection
- Inventory systems and containers using Libav 12.3 or related distro packages.
- Identify services that process externally supplied media through Libav or avconv.
- Confirm Debian LTS hosts include the DLA 2021-1 libav update.
- Review crash telemetry for decoder failures in Libav media-processing workflows.
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-2019-14443 mapping review
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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=1161#c1CVE reference · x_refsource_MISC
- [debian-lts-announce] 20191205 [SECURITY] [DLA 2021-1] libav 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.