Summary
The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
Security Fix(es):
* httpd: Request splitting via HTTP/2 method injection and mod_proxy (CVE-2021-33193)
* httpd: mod_proxy_uwsgi: out-of-bounds read via a crafted request uri-path (CVE-2021-36160)
* httpd: possible NULL dereference or SSRF in forward proxy configurations (CVE-2021-44224)
* httpd: Single zero byte stack overflow in mod_auth_digest (CVE-2020-35452)
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.
Additional Changes:
For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.
Fixed packages 20
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 8 | httpd | 2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | httpd | 2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | httpd-devel | 2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | httpd-devel | 2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | httpd-filesystem | 2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | httpd-filesystem | 2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | httpd-manual | 2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | httpd-manual | 2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | httpd-tools | 2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | httpd-tools | 2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | mod_http2 | 1.15.7-5.module_el8.6.0+2872+fe0ff7aa |
| AlmaLinux · 8 | mod_ldap | 2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | mod_ldap | 2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | mod_md | 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa |
| AlmaLinux · 8 | mod_proxy_html | 1:2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | mod_proxy_html | 1:2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | mod_session | 2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | mod_session | 2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
| AlmaLinux · 8 | mod_ssl | 1:2.4.37-47.module_el8.6.0+2872+fe0ff7aa.1.alma |
| AlmaLinux · 8 | mod_ssl | 1:2.4.37-47.module_el8.6.0+2935+fb177b09.2 |
Vulnerabilities 4
-
Unscored —CVE-2020-35452 EPSS 53%
mod_auth_digest possible stack overflow by one nul byte
Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team could create one, though some particular compile…
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Unscored —CVE-2021-33193 EPSS 46%
Request splitting via HTTP/2 method injection and mod_proxy
A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.
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Unscored —CVE-2021-36160 EPSS 64%
mod_proxy_uwsgi out of bound read
A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).
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Unscored —CVE-2021-44224 EPSS 82%
Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier
A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Soc…
References
-
report
https://bugzilla.redhat.com/1966724
-
report
https://bugzilla.redhat.com/1966728
-
report
https://bugzilla.redhat.com/1984828
-
report
https://bugzilla.redhat.com/2001046
-
report
https://bugzilla.redhat.com/2005124
-
report
https://bugzilla.redhat.com/2034672
-
advisory
https://errata.almalinux.org/8/ALSA-2022-1915.html
-
report
https://vulners.com/cve/CVE-2020-35452
-
report
https://vulners.com/cve/CVE-2021-33193
-
report
https://vulners.com/cve/CVE-2021-36160
-
report
https://vulners.com/cve/CVE-2021-44224