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Test ID:1.3.6.1.4.1.25623.1.1.13.2021.280.01
Category:Slackware Local Security Checks
Title:Slackware: Security Advisory (SSA:2021-280-01)
Summary:The remote host is missing an update for the 'httpd' package(s) announced via the SSA:2021-280-01 advisory.
Description:Summary:
The remote host is missing an update for the 'httpd' package(s) announced via the SSA:2021-280-01 advisory.

Vulnerability Insight:
New httpd packages are available for Slackware 14.0, 14.1, 14.2, and -current
to fix a security issue.


Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
patches/packages/httpd-2.4.51-i586-1_slack14.2.txz: Upgraded.
SECURITY: 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) (cve.mitre.org)
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
paths, this could allow for remote code execution.
This issue only affects Apache 2.4.49 and Apache 2.4.50 and not
earlier versions.
Credits: Reported by Juan Escobar from Dreamlab Technologies,
Fernando MuA+-oz from NULL Life CTF Team, and Shungo Kumasaka
For more information, see:
[link moved to references]
(* Security fix *)
+--------------------------+

Affected Software/OS:
'httpd' package(s) on Slackware 14.0, Slackware 14.1, Slackware 14.2, Slackware current.

Solution:
Please install the updated package(s).

CVSS Score:
7.5

CVSS Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2021-41773
Cisco Security Advisory: 20211007 Apache HTTP Server Vulnerabilties: October 2021
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
https://security.netapp.com/advisory/ntap-20211029-0009/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/
https://security.gentoo.org/glsa/202208-20
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html
http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html
http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
https://httpd.apache.org/security/vulnerabilities_24.html
https://www.oracle.com/security-alerts/cpujan2022.html
https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45@%3Cannounce.apache.org%3E
https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E
https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f@%3Cusers.httpd.apache.org%3E
https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E
http://www.openwall.com/lists/oss-security/2021/10/05/2
http://www.openwall.com/lists/oss-security/2021/10/07/6
http://www.openwall.com/lists/oss-security/2021/10/07/1
http://www.openwall.com/lists/oss-security/2021/10/08/1
http://www.openwall.com/lists/oss-security/2021/10/08/2
http://www.openwall.com/lists/oss-security/2021/10/08/3
http://www.openwall.com/lists/oss-security/2021/10/08/4
http://www.openwall.com/lists/oss-security/2021/10/08/5
http://www.openwall.com/lists/oss-security/2021/10/08/6
http://www.openwall.com/lists/oss-security/2021/10/09/1
http://www.openwall.com/lists/oss-security/2021/10/11/4
http://www.openwall.com/lists/oss-security/2021/10/15/3
http://www.openwall.com/lists/oss-security/2021/10/16/1
Common Vulnerability Exposure (CVE) ID: CVE-2021-42013
http://jvn.jp/en/jp/JVN51106450/index.html
http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.html
https://www.povilaika.com/apache-2-4-50-exploit/
http://packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Path-Traversal-Code-Execution.html
http://packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html
https://www.oracle.com/security-alerts/cpuapr2022.html
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