Apache HTTP Server 2.4.49/2.4.50 Incomplete Fix CVE-2021-41773 path traversal

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Apache HTTP Server 2.4.49/2.4.50. Affected by this issue is some unknown functionality of the component Incomplete Fix CVE-2021-41773. Executing a manipulation can lead to path traversal. This vulnerability is tracked as CVE-2021-42013. The attack can be launched remotely. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Apache HTTP Server 2.4.49/2.4.50 (Web Server). This vulnerability affects an unknown code block of the component Incomplete Fix CVE-2021-41773. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 10/07/2021. The advisory is available at httpd.apache.org. This vulnerability was named CVE-2021-42013 since 10/06/2021. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

It is possible to download the exploit at packetstormsecurity.com. It is declared as attacked. As 0-day the estimated underground price was around $25k-$100k. This issue was added on 11/03/2021 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 11/17/2021:

Apply updates per vendor instructions.

Upgrading to version 2.4.51 eliminates this vulnerability. The upgrade is hosted for download at httpd.apache.org.

The vulnerability is also documented in the vulnerability database at Exploit-DB (50406). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: HTTP Server 2.4.51

Timelineinfo

10/06/2021 🔍
10/07/2021 +1 days 🔍
10/07/2021 +0 days 🔍
11/07/2024 +1127 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: httpd.apache.org
Status: Confirmed

CVE: CVE-2021-42013 (🔍)
GCVE (CVE): GCVE-0-2021-42013
GCVE (VulDB): GCVE-100-184042
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/07/2021 21:30
Updated: 11/07/2024 20:38
Changes: 10/07/2021 21:30 (41), 10/10/2021 15:06 (1), 04/22/2024 07:28 (25), 07/26/2024 21:49 (19), 09/01/2024 19:09 (2), 09/16/2024 14:18 (2), 11/07/2024 20:38 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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