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nvd[email protected]NVD:CVE-2021-21703
HistoryOct 25, 2021 - 6:15 a.m.

CVE-2021-21703

2021-10-2506:15:06
CWE-787
CWE-284
web.nvd.nist.gov
1

CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS3

7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.001

Percentile

51.0%

In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower-privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.

Affected configurations

NVD
Node
phpphpRange7.3.07.3.31
OR
phpphpRange7.4.07.4.25
OR
phpphpRange8.0.08.0.12
Node
debiandebian_linuxMatch9.0
OR
debiandebian_linuxMatch10.0
OR
debiandebian_linuxMatch11.0
Node
fedoraprojectfedoraMatch33
OR
fedoraprojectfedoraMatch34
OR
fedoraprojectfedoraMatch35
Node
netappclustered_data_ontapMatch-
Node
oraclecommunications_diameter_signaling_routerRange8.0.0.08.5.0.2

CVSS2

6.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS3

7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.001

Percentile

51.0%