What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-01 · updated 2026-06-17
• Weakness: CWE-125

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.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04, 19.10, 20.04
• Debian Linux: 8.0, 9.0, 10.0
• openSUSE Leap: 15.1
• PHP: from 7.2.0 before 7.2.29; from 7.3.0 before 7.3.16; from 7.4.0 before 7.4.4 — fixed in 7.2.29, 7.3.16, 7.4.4
• Tenable.sc: before 5.19.0 — fixed in 5.19.0

How to fix

Upgrade to a fixed version: PHP 7.2.29, 7.3.16, 7.4.4; Tenable.sc 5.19.0. Check the vendor advisory for mitigations.

References

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

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