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Lookup for vulnerable packages by Package URL.

Purlpkg:apache/httpd@2.4.49
Typeapache
Namespace
Namehttpd
Version2.4.49
Qualifiers
Subpath
Is_vulnerabletrue
Next_non_vulnerable_version2.4.54
Latest_non_vulnerable_version2.4.54
Affected_by_vulnerabilities
0
url VCID-ffpe-1ctd-77e9
vulnerability_id VCID-ffpe-1ctd-77e9
summary 
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives.

If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution.

This issue is known to be exploited in the wild.

This issue only affects Apache 2.4.49 and not earlier versions.
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41773.json
reference_id
reference_type
scores
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scoring_system cvssv3
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41773.json
1
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-41773
reference_id
reference_type
scores
0
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scoring_system epss
scoring_elements 0.99973
published_at 2026-04-13T12:55:00Z
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reference_url https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
reference_id
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scores
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reference_id 2010757
reference_type
scores
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reference_url http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
reference_id Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
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18
reference_url http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html
reference_id Apache-HTTP-Server-2.4.49-Path-Traversal.html
reference_type
scores
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1
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19
reference_url http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html
reference_id Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html
reference_type
scores
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20
reference_url http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
reference_id Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
reference_type
scores
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21
reference_url https://security.archlinux.org/AVG-2442
reference_id AVG-2442
reference_type
scores
0
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scoring_system archlinux
scoring_elements
url https://security.archlinux.org/AVG-2442
22
reference_url https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
reference_id cisco-sa-apache-httpd-pathtrv-LAzg68cZ
reference_type
scores
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23
reference_url https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/50383.sh
reference_id CVE-2021-41773
reference_type exploit
scores
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24
reference_url https://httpd.apache.org/security/json/CVE-2021-41773.json
reference_id CVE-2021-41773
reference_type
scores
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25
reference_url https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/50512.py
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reference_type exploit
scores
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26
reference_url https://security.gentoo.org/glsa/202208-20
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27
reference_url https://security.netapp.com/advisory/ntap-20211029-0009/
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reference_type
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reference_url https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org%3E
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reference_url https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/
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fixed_packages
0
url pkg:apache/httpd@2.4.50
purl pkg:apache/httpd@2.4.50
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-qn74-neyt-jkg9
resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.50
aliases CVE-2021-41773
risk_score 10.0
exploitability 2.0
weighted_severity 8.0
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-ffpe-1ctd-77e9
1
url VCID-hj5r-jms3-x3fe
vulnerability_id VCID-hj5r-jms3-x3fe
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.
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41524.json
reference_id
reference_type
scores
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url pkg:apache/httpd@2.4.50
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vulnerability VCID-qn74-neyt-jkg9
resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.50
aliases CVE-2021-41524
risk_score 4.0
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url VCID-qn74-neyt-jkg9
vulnerability_id VCID-qn74-neyt-jkg9
summary 
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient.  An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives.  

If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution.

This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
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resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.51
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risk_score 10.0
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url VCID-9u53-b79b-cfgd
vulnerability_id VCID-9u53-b79b-cfgd
summary 
Malformed requests may cause the server to dereference a NULL pointer.


This issue affects Apache HTTP Server 2.4.48 and earlier.
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resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.49
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summary 
A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning.

This issue affects Apache HTTP Server 2.4.17 to 2.4.48.
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resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.49
aliases CVE-2021-33193
risk_score 4.0
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resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-db6k-j9mj-e7hy
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url VCID-mtg7-8556-kbgd
vulnerability_id VCID-mtg7-8556-kbgd
summary 
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user.

This issue affects Apache HTTP Server 2.4.48 and earlier.
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resource_url http://public2.vulnerablecode.io/packages/pkg:apache/httpd@2.4.49
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A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS).

This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).
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summary 
ap_escape_quotes() may write beyond the end of a buffer when given malicious input.  
No included modules pass untrusted data to these functions, but third-party / external modules may.

This issue affects Apache HTTP Server 2.4.48 and earlier.
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