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kasperskyKaspersky LabKLA12371
HistoryOct 04, 2021 - 12:00 a.m.

KLA12371 Multiple vulnerabilities in Apache HTTP Server

2021-10-0400:00:00
Kaspersky Lab
threats.kaspersky.com
82

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

9.5

Confidence

High

EPSS

0.975

Percentile

100.0%

Multiple vulnerabilities were found in Apache HTTP Server. Malicious users can exploit these vulnerabilities to cause denial of service, execute arbitrary code, obtain sensitive information.

Below is a complete list of vulnerabilities:

  1. NULL pointer dereference vulnerability in h2 fuzzing can be exploited remotely via special crafted request to cause denial of service.
  2. Remote code execution vulnerability in httpd can be exploited remotely to obtain sensitive information and execute arbitrary code.

Original advisories

Fixed in Apache HTTP Server 2.4.50

Exploitation

Public exploits exist for this vulnerability.

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Related products

Apache-HTTP-Server

CVE list

CVE-2021-41524 critical

CVE-2021-41773 critical

Solution

Update to the latest version

Download Apache HTTP Server

Impacts

  • ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

  • OSI

Obtain sensitive information. Exploitation of vulnerabilities with this impact can lead to capturing by abuser information, critical for user or system.

  • DoS

Denial of service. Exploitation of vulnerabilities with this impact can lead to loss of system availability or critical functional fault.

Affected Products

  • Apache HTTP Server earlier than 2.4.50

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

9.5

Confidence

High

EPSS

0.975

Percentile

100.0%