Multiple vulnerabilities in Apache HTTP Server

Description

Multiple vulnerabilities were found in Apache HTTP Server. Malicious users can exploit these vulnerabilities to cause denial of service, bypass security restrictions.

Below is a complete list of vulnerabilities:

1. Heap overflow vulnerability in mod_session can be exploited via special crafted SessionHandler to cause denial of service.
2. NULL pointer dereference vulnerability in mod_session can be exploited via special crafted coockie header to cause denial of service.
3. Security bypass vulnerability vulnerability in httpd can be exploited to bypass security restrictions.
4. NULL pointer dereference vulnerability in mod_http2 can be exploited via special crafted HTTP/2 request to cause denial of service.
5. Security bypass vulnerability in mod_proxy_wstunnel can be exploited to bypass security restrictions.
6. Stack overflow vulnerability in mod_auth_digest can be exploited bia specia crafted digest to cause denial of service.
7. Security bypass vulnerability in “MergeSlashes OFF” can be exploited via special crafted URL to bypass security restrictions.
8. NULL pointer dereference vulnerability in mod_proxy_http can be exploited via special crafted requests to cause denial of service.

Original advisories

• Fixed in Apache HTTP Server 2.4.48

Related products

• Apache-HTTP-Server

CVE list

• CVE-2021-26691
  critical
• CVE-2021-26690
  critical
• CVE-2020-13938
  high
• CVE-2021-31618
  critical
• CVE-2019-17567
  high
• CVE-2020-35452
  high
• CVE-2021-30641
  high
• CVE-2020-13950
  critical

Read more

Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com