Medium severity · published Oct 4, 2021
CVE-2021-21706
In PHP versions 7.3.x below 7.3.31, 7.4.x below 7.4.24 and 8.0.x below 8.0.11, in Microsoft Windows environment, ZipArchive::extractTo may be tricked into writing a file outside…
6.5
CVSS
1.4%
EPSS
No
On KEV
Description
In PHP versions 7.3.x below 7.3.31, 7.4.x below 7.4.24 and 8.0.x below 8.0.11, in Microsoft Windows environment, ZipArchive::extractTo may be tricked into writing a file outside target directory when extracting a ZIP file, thus potentially causing files to be created or overwritten, subject to OS permissions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
PHP · PHP
7.3.0 before 7.3.31; 7.4.0 before 7.4.24; 8.0.0 before 8.0.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21706
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21706
Issue Tracking
https://bugs.php.net/bug.php?id=81420
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211029-0007/
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