Red Hat Security Advisory: httpd security update

Fixed packages 36

Vulnerabilities 4

• Unscored —
  CVE-2021-26691 EPSS 68%

  Apache HTTP Server mod_session response handling heap overflow

  In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow

  Apache Software Foundation Apache HTTP Server apache2 apache2 Debian Ubuntu Azure Linux Alpine
  Jun 10, 2021
• Unscored —
  CVE-2021-34798 EPSS 65%

  NULL pointer dereference in httpd core

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

  Apache Software Foundation Apache HTTP Server apache2 apache2 Debian Ubuntu Azure Linux Alpine
  Sep 16, 2021
• Unscored —
  CVE-2021-39275 EPSS 39%

  ap_escape_quotes buffer overflow

  ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier.

  Apache Software Foundation Apache HTTP Server apache2 apache2 Debian Ubuntu Azure Linux Alpine
  Sep 16, 2021
• Unscored —
  CVE-2021-44790 Public exploit EPSS 97%

  Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier

  A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue af…

  Apache Software Foundation Apache HTTP Server apache2 apache2 Debian Ubuntu Azure Linux Alpine
  Dec 20, 2021

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=1966732
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2005119
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2005128
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2034674
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2022/rhsa-2022_0143.json
• report
  https://access.redhat.com/security/cve/CVE-2021-26691
• advisory
  https://www.cve.org/CVERecord?id=CVE-2021-26691
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2021-26691
• article
  https://httpd.apache.org/security/vulnerabilities_24.html
• report
  https://access.redhat.com/security/cve/CVE-2021-34798
• advisory
  https://www.cve.org/CVERecord?id=CVE-2021-34798
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2021-34798
• report
  https://access.redhat.com/security/cve/CVE-2021-39275
• advisory
  https://www.cve.org/CVERecord?id=CVE-2021-39275
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2021-39275
• report
  https://access.redhat.com/security/cve/CVE-2021-44790
• advisory
  https://www.cve.org/CVERecord?id=CVE-2021-44790
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2021-44790
• article
  http://httpd.apache.org/security/vulnerabilities_24.html