7.5
HIGH
CVE-2021-34798
Apache HTTP Server NULL Pointer Dereference Vulnerability
Description

Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.

INFO

Published Date :

Sept. 16, 2021, 3:15 p.m.

Last Modified :

Nov. 7, 2023, 3:36 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2021-34798 has a 8 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-34798 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Oracle zfs_storage_appliance_kit
2 Oracle peoplesoft_enterprise_peopletools
3 Oracle http_server
4 Oracle instantis_enterprisetrack
5 Oracle enterprise_manager_base_platform
6 Oracle communications_cloud_native_core_network_function_cloud_native_environment
1 Siemens sinema_remote_connect_server
2 Siemens sinec_nms
3 Siemens sinema_server
4 Siemens ruggedcom_nms
1 Netapp cloud_backup
2 Netapp clustered_data_ontap
3 Netapp storagegrid
1 Fedoraproject fedora
1 Debian debian_linux
1 Apache http_server
1 Tenable tenable.sc
1 Broadcom brocade_fabric_operating_system_firmware
: Total Affected Vendor : 8 | Products : 18
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-34798.

URL Resource
http://httpd.apache.org/security/vulnerabilities_24.html Release Notes Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf Patch Third Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10379 Third Party Advisory
https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E
https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E
https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E
https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E
https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
https://security.gentoo.org/glsa/202208-20 Third Party Advisory
https://security.netapp.com/advisory/ntap-20211008-0004/ Third Party Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ Third Party Advisory
https://www.debian.org/security/2021/dsa-4982 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://www.tenable.com/security/tns-2021-17 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
Samaritin/OSINT

None

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : Oct. 19, 2024, 7:04 p.m. This repo has been linked 146 different CVEs too.
Profile Photo
Farrhouq/Inpt-report

Imoro Umar Farouq's report on Internal Network Penetration Testing

Shell

Updated: 2 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : Sept. 12, 2024, 11:46 a.m. This repo has been linked 161 different CVEs too.
Profile Photo
jkiala2/Projet_etude_M1

None

Batchfile Python

Updated: 4 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : May 1, 2024, 4:19 p.m. This repo has been linked 19 different CVEs too.
Profile Photo
kasem545/vulnsearch

find vulnerabilities in webserver

Shell

Updated: 2 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : Aug. 12, 2023, 12:57 a.m. This repo has been linked 55 different CVEs too.
Profile Photo
bioly230/THM_Skynet

None

Updated: 1 year, 4 months ago
0 stars 0 fork 0 watcher
Born at : June 30, 2023, 2:41 p.m. This repo has been linked 78 different CVEs too.
Profile Photo
8ctorres/SIND-Practicas

Prácticas Seguridad en Entornos Industriales

Python

Updated: 9 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : March 7, 2023, 9:13 p.m. This repo has been linked 52 different CVEs too.
Profile Photo
Totes5706/TotesHTB

Walkthrough and Writeups for the HackTheBox Penetration Lab Testing Environment

Updated: 2 years, 4 months ago
0 stars 0 fork 0 watcher
Born at : July 16, 2022, 12:34 p.m. This repo has been linked 42 different CVEs too.
Profile Photo
PierreChrd/py-projet-tut

None

Python Batchfile

Updated: 2 years, 7 months ago
0 stars 0 fork 0 watcher
Born at : April 19, 2022, 2:35 p.m. This repo has been linked 19 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-34798 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-34798 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Apache Software Foundation https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/ [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3E [No types assigned]
    Added Reference Apache Software Foundation https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/ [No types assigned]
    Removed Reference Apache Software Foundation https://lists.fedoraproject.org/archives/list/[email protected]/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029@%3Cusers.httpd.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697@%3Cusers.httpd.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432@%3Cusers.httpd.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c@%3Cusers.httpd.apache.org%3E
    Removed Reference Apache Software Foundation https://lists.fedoraproject.org/archives/list/[email protected]/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
  • Modified Analysis by [email protected]

    Oct. 28, 2022

    Action Type Old Value New Value
    Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf Patch, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/202208-20 No Types Assigned https://security.gentoo.org/glsa/202208-20 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:siemens:ruggedcom_nms:*:*:*:*:*:*:*:* *cpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:* *cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* versions up to (excluding) 3.1 *cpe:2.3:a:siemens:sinema_server:14.0:-:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Aug. 15, 2022

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202208-20 [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 14, 2022

    Action Type Old Value New Value
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf [No Types Assigned]
  • Modified Analysis by [email protected]

    May. 13, 2022

    Action Type Old Value New Value
    Changed Reference Type https://www.oracle.com/security-alerts/cpuapr2022.html No Types Assigned https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:* *cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* *cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* OR *cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:enterprise_manager_base_platform:13.5.0.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:* *cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:* *cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* *cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* *cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* *cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Apr. 20, 2022

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/security-alerts/cpuapr2022.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Mar. 25, 2022

    Action Type Old Value New Value
    Changed Reference Type https://kc.mcafee.com/corporate/index?page=content&id=SB10379 No Types Assigned https://kc.mcafee.com/corporate/index?page=content&id=SB10379 Third Party Advisory
    Changed Reference Type https://www.oracle.com/security-alerts/cpujan2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:* OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:* *cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* *cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Mar. 23, 2022

    Action Type Old Value New Value
    Added Reference https://kc.mcafee.com/corporate/index?page=content&id=SB10379 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 07, 2022

    Action Type Old Value New Value
    Added Reference https://www.oracle.com/security-alerts/cpujan2022.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Nov. 29, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20211008-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20211008-0004/ Third Party Advisory
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2021/dsa-4982 No Types Assigned https://www.debian.org/security/2021/dsa-4982 Third Party Advisory
    Changed Reference Type https://www.tenable.com/security/tns-2021-17 No Types Assigned https://www.tenable.com/security/tns-2021-17 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:* versions up to (including) 5.19.1
  • CVE Modified by [email protected]

    Nov. 24, 2021

    Action Type Old Value New Value
    Added Reference https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-2.4.49-VWL69sWQ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 19, 2021

    Action Type Old Value New Value
    Added Reference https://www.tenable.com/security/tns-2021-17 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 10, 2021

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2021/dsa-4982 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 08, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20211008-0004/ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 02, 2021

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Sep. 27, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://httpd.apache.org/security/vulnerabilities_24.html No Types Assigned http://httpd.apache.org/security/vulnerabilities_24.html Release Notes, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432@%3Cusers.httpd.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432@%3Cusers.httpd.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c@%3Cusers.httpd.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c@%3Cusers.httpd.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697@%3Cusers.httpd.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697@%3Cusers.httpd.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029@%3Cusers.httpd.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029@%3Cusers.httpd.apache.org%3E Mailing List, Vendor Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/ Mailing List, Third Party Advisory
    Added CWE NIST CWE-476
    Added CPE Configuration OR *cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* versions up to (including) 2.4.48
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 25, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/ [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 23, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c@%3Cusers.httpd.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 23, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432@%3Cusers.httpd.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 23, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029@%3Cusers.httpd.apache.org%3E [No Types Assigned]
    Added Reference https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697@%3Cusers.httpd.apache.org%3E [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 20, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-34798 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-34798 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.87 }} 0.23%

score

0.82804

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: