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debianDebianDEBIAN:DSA-4992-1:45DA4
HistoryOct 25, 2021 - 8:20 p.m.

[SECURITY] [DSA 4992-1] php7.4 security update

2021-10-2520:20:43
lists.debian.org
24

6.9 Medium

CVSS2

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

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

51.0%


Debian Security Advisory DSA-4992-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
October 25, 2021 https://www.debian.org/security/faq


Package : php7.4
CVE ID : CVE-2021-21703
Debian Bug : 997003

An out-of-bounds read and write flaw was discovered in the PHP-FPM code,
which could result in escalation of privileges from local unprivileged
user to the root user.

For the stable distribution (bullseye), this problem has been fixed in
version 7.4.25-1+deb11u1.

We recommend that you upgrade your php7.4 packages.

For the detailed security status of php7.4 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/php7.4

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

6.9 Medium

CVSS2

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

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

51.0%