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Vulnerability details: VCID-25qc-gvuw-aaah
Vulnerability ID VCID-25qc-gvuw-aaah
Aliases CVE-2021-21704
Summary In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using Firebird PDO driver extension, a malicious database server could cause crashes in various database functions, such as getAttribute(), execute(), fetch() and others by returning invalid response data that is not parsed correctly by the driver. This can result in crashes, denial of service or potentially memory corruption.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-787 Out-of-bounds Write
CWE-20 Improper Input Validation
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-21704.html
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-21704.json
epss 0.00131 https://api.first.org/data/v1/epss?cve=CVE-2021-21704
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rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1978790
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21704
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21705
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-21704
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-21704
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-21704
archlinux Medium https://security.archlinux.org/AVG-2132
generic_textual Medium https://ubuntu.com/security/notices/USN-5006-1
generic_textual Medium https://ubuntu.com/security/notices/USN-5006-2
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-21704.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-21704.json
https://api.first.org/data/v1/epss?cve=CVE-2021-21704
https://bugs.php.net/bug.php?id=76448
https://bugs.php.net/bug.php?id=76449
https://bugs.php.net/bug.php?id=76450
https://bugs.php.net/bug.php?id=76452
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21704
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21705
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202209-20
https://security.netapp.com/advisory/ntap-20211029-0006/
https://ubuntu.com/security/notices/USN-5006-1
https://ubuntu.com/security/notices/USN-5006-2
1978790 https://bugzilla.redhat.com/show_bug.cgi?id=1978790
990575 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990575
ASA-202107-15 https://security.archlinux.org/ASA-202107-15
AVG-2132 https://security.archlinux.org/AVG-2132
cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
cpe:2.3:a:php:php:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
CVE-2021-21704 https://nvd.nist.gov/vuln/detail/CVE-2021-21704
USN-5006-1 https://usn.ubuntu.com/5006-1/
USN-5006-2 https://usn.ubuntu.com/5006-2/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-21704.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21704
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21704
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21704
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.29517
EPSS Score 0.00131
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.