RHSA-2022:0143 - Security Advisory

Topic

An update for httpd is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: mod_lua: Possible buffer overflow when parsing multipart content (CVE-2021-44790)
• httpd: mod_session: Heap overflow via a crafted SessionHeader value (CVE-2021-26691)
• httpd: NULL pointer dereference via malformed requests (CVE-2021-34798)
• httpd: Out-of-bounds write in ap_escape_quotes() via malicious input (CVE-2021-39275)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, the httpd daemon will be restarted automatically.

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le

Fixes

• BZ - 1966732 - CVE-2021-26691 httpd: mod_session: Heap overflow via a crafted SessionHeader value
• BZ - 2005119 - CVE-2021-39275 httpd: Out-of-bounds write in ap_escape_quotes() via malicious input
• BZ - 2005128 - CVE-2021-34798 httpd: NULL pointer dereference via malformed requests
• BZ - 2034674 - CVE-2021-44790 httpd: mod_lua: Possible buffer overflow when parsing multipart content

CVEs

• CVE-2021-26691
• CVE-2021-34798
• CVE-2021-39275
• CVE-2021-44790

References

• https://access.redhat.com/security/updates/classification/#important