NULL pointer dereference in PHP
CVE-2020-7062
In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7.4.x below 7.4.3, when using file upload functionality, if upload progress tracking is enabled, but session.upload_progress.cleanup is set to 0 (disabled), and the file upload fails, the upload procedure would try to clean up data that does not exist and encounter null pointer dereference, which would likely lead to a crash.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.036 (89.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: -0.000
Affected products
- PHP
- PHP Group — versions 7.3.x, 7.4.x, 7.2.x
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 8.0, 9.0, 10.0
- openSUSE Leap — versions 15.1
Weakness classification (CWE)
References
- bugs.php.net/bug.php (Exploit, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00023.html (vendor-advisory, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202003-57 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/03/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4330-1/ (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2020/dsa-4717 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2020/dsa-4719 (vendor-advisory, Third Party Advisory)
- www.tenable.com/security/tns-2021-14 (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-7062?
- CVE-2020-7062 is a high-severity vulnerability in PHP, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-02-27.
- How severe is CVE-2020-7062?
- High severity. CVSS v3 base score is 7.5 out of 10.