CVE-2020-7062: Null Pointer Dereference in PHP Session Upload Progress
Vulnerability summary
CVE-2020-7062 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 3.58% chance of exploitation in the next 30 days, higher than 89.4% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 8Timeline
- 27-02-2020PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.58%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.58% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugs.php.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- php5< 5.5.9+dfsg-1ubuntu4.29+esm11
- php7.0< 7.0.33-0ubuntu0.16.04.14
- php7.2< 7.2.24-0ubuntu0.18.04.4
Debian2 products
- php7.4< 7.4.3-1
- debian_linuxEOL8.0 | 9.0 | 10.0
Alpine1 product
- php7< 7.3.15-r0 | < 7.2.31-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04 | 19.10
Opensuse1 product
- leapEOL15.1
Php1 product
- php≥ 7.2.0, ≤ 7.2.27 | ≥ 7.3.0, ≤ 7.3.14 | ≥ 7.4.0, ≤ 7.4.2
Php group1 product
- php≥ 7.3.x, < 7.3.15 | ≥ 7.4.x, < 7.4.3 | ≥ 7.2.x, < 7.2.28
7 vendors · 10 products
References
14 links- lists.opensuse.org/opensuse-security-announce/2020-03/msg00023.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2020/03/msg00034.htmlMailing ListX Refsource MLISTThird Party Advisory