CVE-2021-41773

Description from NVD

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. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.

Information Acquisition Date:2021-11-03T14:54Z
CVSS 2.0: 4.3 MEDIUM CVSS 3.x: 7.5 HIGH

▼ CVSS3 Vec CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

▼ CVSS2 Vec AV:N/AC:M/Au:N/C:P/I:N/A:N

NVD References

 https://httpd.apache.org/security/vulnerabilities_24.html
     source:MISC
     tags:Vendor Advisory    
 [httpd-users] 20211005 [users@httpd] CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
     source:MLIST
     tags:Mailing List    Vendor Advisory    
 [announce] 20211005 CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
     source:MLIST
     tags:Mailing List    Vendor Advisory    
 [oss-security] 20211005 CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
     source:MLIST
     tags:Mailing List    Third Party Advisory    
 http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html
     source:MISC
     tags:Exploit    Third Party Advisory    VDB Entry    
 [oss-security] 20211007 RE: CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
     source:MLIST
     tags:Third Party Advisory    
 http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html
     source:MISC
     tags:Exploit    Third Party Advisory    
 [announce] 20211007 CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Mailing List    Vendor Advisory    
 [httpd-users] 20211007 [users@httpd] CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Mailing List    Vendor Advisory    
 [oss-security] 20211007 CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 20211007 Apache HTTP Server Vulnerabilties: October 2021
     source:CISCO
     tags:Third Party Advisory    
 [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 [httpd-cvs] 20211008 [httpd-site] branch main updated: * Align with CVE-2021-42013 based on the latest findings
     source:MLIST
     tags:Mailing List    Vendor Advisory    
 [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 [oss-security] 20211008 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 [oss-security] 20211009 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 [oss-security] 20211011 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:Third Party Advisory    
 FEDORA-2021-2a10bc68a4
     source:FEDORA
     tags:
 FEDORA-2021-aaf90ef84a
     source:FEDORA
     tags:
 [oss-security] 20211015 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:
 [oss-security] 20211016 Re: CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
     source:MLIST
     tags:
 http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
     source:MISC
     tags:
 https://security.netapp.com/advisory/ntap-20211029-0009/
     source:CONFIRM
     tags:

This vulnerability may involve a PoC.

Description from Forti

Information Acquisition Date:2020/01/22

Affected Products

Impact

Recommended Actions

References

Refer to Information on External Sites

CVE InfomationExploits or more Infomation
mitreEXPLOIT DATABASE
NVD0day.today
vulmon.comgithub
CVE DetailsTwitter
JVN ENG JPN
Reconshell

Software Tag: Apache(263 tweets) Apple(2 tweets) Chrome(1 tweets) Firefox(1 tweets) Linux(10 tweets) PHP(4 tweets) Windows(1 tweets) Wordpress(3 tweets) iOS(4 tweets)



List of frequently cited URLs

URLNum of Times Referred to
https://alerts.vulmon.com/?utm_source=twitter&utm_medium=so...228
http://twinybots.ch32
https://piyolog.hatenadiary.jp/entry/2021/10/10/03183425
https://tryhackme.com/room/cve20214177319
https://lists.astaro.com/ASGV9-IPS-rules.html#018
https://securityaffairs.co/wordpress/123148/hacking/nmap-sc...16
https://threatpost.com/apache-web-server-zero-day-sensitive...11
https://bit.ly/3FnTtIt8
http://127.0.0.17
https://therecord.media/apache-fixes-actively-exploited-web...7
https://httpd.apache.org/security/vulnerabilities_24.html7
https://security.sios.com/vulnerability/apache-security-vul...7
https://blog.qualys.com/vulnerabilities-threat-research/202...6
https://www.tenable.com/blog/cve-2021-41773-path-traversal-...6
https://access.redhat.com/security/cve/CVE-2021-417736
http://127.0.0.1:8080/cgi-bin/.%2e/.%2e/.%2e/.%2e/bin/sh5
https://www.nri-secure.co.jp/blog/apache-http-server-vulner...5
https://www.securityweek.com/over-100000-apache-http-server...5
https://cert.at/de/warnungen/2021/10/wichtige-sicherheitslu...4
https://yamory.io/4
https://prtimes.jp/main/html/rd/p/000000015.000073493.html4
https://ubuntu.com/security/CVE-2021-417734
https://twitter.com/iamamoose/status/14453048389638307844
https://www.cve.org/CVERecord?id=CVE-2021-417734
https://team-cymru.com/blog/2021/10/07/apache-vulnerability...4
https://www.rapid7.com/blog/post/2021/10/06/apache-http-ser...4
https://www.greynoise.io/viz/query/?gnql=cve%3ACVE-2021-417734
https://blogs.juniper.net/en-us/enterprise-cloud-and-transf...4
https://blog.segu-info.com.ar/2021/10/path-traversal-critic...4
https://ipssignatures.appspot.com/?cve=CVE-2021-417734
https://j.mp/3EAPRS13
https://ift.tt/3a8v8aX3
https://noc.org/2021/10/08/active-exploits-against-cve-2021...3
http://earmas.ga3
http://shodan.io3
https://github.com/projectdiscovery/nuclei-templates/blob/m...3
https://gigazine.net/news/20211006-apache-servers-exploited...3
https://isc.sans.edu/diary/rss/279403
http://mi6rogue.com/blog3
https://www.ipa.go.jp/security/ciadr/vul/alert20211006.html3
https://www.scutum.jp/information/technical_articles/index....3
https://b.hatena.ne.jp/entry?url=https%3A%2F%2Fpiyolog.hate...3
https://fr.tenable.com/blog/cve-2021-41773-path-traversal-z...3
https://www.netwings.jp/posts/218825293
https://www.jpcert.or.jp/at/2021/at210043.html3
https://thehackernews.com/2021/10/apache-warns-of-zero-day-...3
https://wizsafe.iij.ad.jp/2021/10/1285/3
https://www.pwndefend.com/2021/10/05/creating-a-honeypot-fo...3
https://blog.cloudflare.com/helping-apache-servers-stay-saf...3
https://www.hackplayers.com/2021/10/path-traversal-apache-2...3
http://feedproxy.google.com/~r/PentestTools/~3/8_TI1-FA7is/...3
https://www.marketscreener.com/quote/stock/QUALYS-INC-11612...3
https://www.bleepingcomputer.com/news/security/apache-fixes...3

▼ Show Information from Twitter(435)


List of frequently cited URLs

URLNum of Times Referred to
alerts.vulmon.com228
twinybots.ch32
piyolog.hatenadiary.jp25
tryhackme.com19
lists.astaro.com18
securityaffairs.co16
threatpost.com11
bit.ly8
127.0.0.17
therecord.media7
httpd.apache.org7
security.sios.com7
blog.qualys.com6
www.tenable.com6
access.redhat.com6
127.0.0.1:80805
www.nri-secure.co.jp5
www.securityweek.com5
cert.at4
yamory.io4
prtimes.jp4
ubuntu.com4
twitter.com4
www.cve.org4
team-cymru.com4
www.rapid7.com4
www.greynoise.io4
blogs.juniper.net4
blog.segu-info.com.ar4
ipssignatures.appspot.com4
j.mp3
ift.tt3
noc.org3
earmas.ga3
shodan.io3
github.com3
gigazine.net3
isc.sans.edu3
mi6rogue.com3
www.ipa.go.jp3
www.scutum.jp3
b.hatena.ne.jp3
fr.tenable.com3
www.netwings.jp3
www.jpcert.or.jp3
thehackernews.com3
wizsafe.iij.ad.jp3
www.pwndefend.com3
blog.cloudflare.com3
www.hackplayers.com3
feedproxy.google.com3
www.marketscreener.com3
www.bleepingcomputer.com3

▼ Show Information from Twitter(435)


GitHub Search Results: Up to 10
NameURL
blasty/CVE-2021-41773 https://github.com/blasty/CVE-2021-41773
inbug-team/CVE-2021-41773_CVE-2021-42013 https://github.com/inbug-team/CVE-2021-41773_CVE-2021-42013
iilegacyyii/PoC-CVE-2021-41773 https://github.com/iilegacyyii/PoC-CVE-2021-41773
justakazh/mass_cve-2021-41773 https://github.com/justakazh/mass_cve-2021-41773
lorddemon/CVE-2021-41773-PoC https://github.com/lorddemon/CVE-2021-41773-PoC
Vulnmachines/cve-2021-41773 https://github.com/Vulnmachines/cve-2021-41773
ZephrFish/CVE-2021-41773-PoC https://github.com/ZephrFish/CVE-2021-41773-PoC
MrCl0wnLab/SimplesApachePathTraversal https://github.com/MrCl0wnLab/SimplesApachePathTraversal
creadpag/CVE-2021-41773-POC https://github.com/creadpag/CVE-2021-41773-POC
Ls4ss/CVE-2021-41773_CVE-2021-42013 https://github.com/Ls4ss/CVE-2021-41773_CVE-2021-42013

GitHub Search Results: Up to 10
NameURL
blasty/CVE-2021-41773 github.com
inbug-team/CVE-2021-41773_CVE-2021-42013 github.com
iilegacyyii/PoC-CVE-2021-41773 github.com
justakazh/mass_cve-2021-41773 github.com
lorddemon/CVE-2021-41773-PoC github.com
Vulnmachines/cve-2021-41773 github.com
ZephrFish/CVE-2021-41773-PoC github.com
MrCl0wnLab/SimplesApachePathTraversal github.com
creadpag/CVE-2021-41773-POC github.com
Ls4ss/CVE-2021-41773_CVE-2021-42013 github.com

2021/11/27 Score : 1
Added Har-sia Database : 2021/10/05
Last Modified : 2021/11/27
Highest Scored Date : 2021/10/06
Highest Score : 492