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CVE-2021-21707

Common vulnerabilities & exposures (CVE)

CVE databaseCVE database blogpostRelease & EoL database
 
Published at: - 29-11-2021 08:15
Last modified: - 20-04-2022 08:15
Total changes: - 7

Description

In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Low
Attack complexity
Network
Attack vector
None
Availability
Low
Confidentiality
None
Integrity
None
Privileges required
Unchanged
Scope
None
User interaction
5.3
Base score
3.9
1.4
Exploitability score
Impact score
 

Verification logic

OR
OR
vendor=php AND product=php AND versionStartIncluding=7.3.0 AND versionEndExcluding=7.3.33
vendor=php AND product=php AND versionStartIncluding=7.4.0 AND versionEndExcluding=7.4.26
vendor=php AND product=php AND versionStartIncluding=8.0.0 AND versionEndExcluding=8.0.13
OR
vendor=netapp AND product=clustered_data_ontap AND version=-
OR
vendor=Debian AND product=debian_linux AND version=11.0
 

Reference

 


Keywords

NVD

 

CVE-2021-21707

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

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