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Vulnerability details: VCID-3cav-6ztc-aaam
Vulnerability ID VCID-3cav-6ztc-aaam
Aliases CVE-2021-41524
Summary While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41524.json
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.00871 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.01091 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.01091 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.01091 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.01091 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.05686 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.05686 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.05686 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
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epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
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epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.06586 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.57323 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=2010934
apache_httpd moderate https://httpd.apache.org/security/json/CVE-2021-41524.json
cvssv3.1 7.5 https://httpd.apache.org/security/vulnerabilities_24.html
generic_textual HIGH https://httpd.apache.org/security/vulnerabilities_24.html
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2021-41524
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-41524
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-41524
archlinux High https://security.archlinux.org/AVG-2442
cvssv3.1 6.6 https://www.oracle.com/security-alerts/cpujan2022.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpujan2022.html
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41524.json
https://api.first.org/data/v1/epss?cve=CVE-2021-41524
https://httpd.apache.org/security/vulnerabilities_24.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/
https://security.gentoo.org/glsa/202208-20
https://security.netapp.com/advisory/ntap-20211029-0009/
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
https://www.oracle.com/security-alerts/cpujan2022.html
http://www.openwall.com/lists/oss-security/2021/10/05/1
2010934 https://bugzilla.redhat.com/show_bug.cgi?id=2010934
AVG-2442 https://security.archlinux.org/AVG-2442
cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:2.4.49:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
CVE-2021-41524 https://httpd.apache.org/security/json/CVE-2021-41524.json
CVE-2021-41524 https://nvd.nist.gov/vuln/detail/CVE-2021-41524
RHSA-2022:7143 https://access.redhat.com/errata/RHSA-2022:7143
RHSA-2022:7144 https://access.redhat.com/errata/RHSA-2022:7144
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41524.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:H/A:N Found at https://httpd.apache.org/security/vulnerabilities_24.html
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:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41524
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41524
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://nvd.nist.gov/vuln/detail/CVE-2021-41524
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:H/UI:N/S:U/C:H/I:H/A:H Found at https://www.oracle.com/security-alerts/cpujan2022.html
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 0.82854
EPSS Score 0.00871
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.