Security readout for executives and security teams
Plain-English summary
This is a crash bug in Exiv2, a library used to read image metadata. Exiv2 0.26 and earlier can read past a heap buffer when parsing a crafted PNG profile, causing the application using it to crash. The business impact is denial of service, not data theft based on the provided sources.
Executive priority
Treat as a moderate availability risk. Prioritize patching systems that automatically ingest customer, partner, or internet-sourced PNG files, especially where image processing availability affects business operations.
Technical view
CVE-2018-19535 affects Exiv2 0.26 and earlier in PngChunk::readRawProfile in pngchunk_int.cpp. A crafted PNG can trigger a heap-based buffer over-read and application crash. The source bundle does not provide CVSS, CWE, privilege, or remote attack-path details.
Likely exposure
Exposure is most likely in servers, desktop tools, or workflows that process untrusted PNG files with Exiv2 0.26 or earlier, including distro-packaged Exiv2 builds covered by Debian, Ubuntu, and Red Hat advisories.
Exploitation context
The bundle supports denial of service through a crafted PNG parsed by vulnerable Exiv2. It does not show CISA KEV listing, active exploitation, public weaponization status, or broader impact beyond application crash.
Researcher notes
The strongest evidence is the CVE description plus upstream issue and pull request references, supported by distribution advisories. The bundle lacks CVSS, CWE, exploit maturity, and exact fixed upstream version details, so avoid over-scoping beyond Exiv2 0.26 and earlier.
Mitigation direction
- Upgrade Exiv2 using the relevant vendor or distribution security update.
- Check upstream Exiv2 guidance and the referenced pull request for fixed code lineage.
- Avoid processing untrusted PNG files with vulnerable Exiv2 versions until patched.
- Run image metadata processing in isolated, resource-limited worker processes.
Validation and detection
- Inventory installed Exiv2 versions and flag 0.26 or earlier.
- Identify applications and pipelines that parse PNG metadata with Exiv2.
- Confirm Debian, Ubuntu, or Red Hat security updates are installed where applicable.
- Review crash logs for Exiv2 PNG profile parsing failures.
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-2018-19535 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://github.com/Exiv2/exiv2/issues/428CVE reference
- [debian-lts-announce] 20190226 [SECURITY] [DLA 1691-1] exiv2 security updateCVE reference · mailing-list
- https://github.com/Exiv2/exiv2/pull/430CVE reference
- USN-4056-1CVE reference · vendor-advisory
- RHSA-2019:2101CVE reference · vendor-advisory
- [debian-lts-announce] 20230110 [SECURITY] [DLA 3265-1] exiv2 security updateCVE reference · mailing-list
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.