Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2021-44790: A buffer overflow flaw in httpd's lua module could allow an out-of-bounds write. An attacker who is able to submit a crafted request to an httpd instance that is using the lua module may be able to cause an impact to confidentiality, integrity, and/or availability. CVE-2021-44224: There's a null pointer dereference and server-side request forgery flaw in httpd's mod_proxy module, when it is configured to be used as a forward proxy. A crafted packet could be sent on the adjacent network to the forward proxy that could cause a crash, or potentially SSRF via misdirected Unix Domain Socket requests. In the worst case, this could cause a denial of service or compromise to confidentiality of data.
Fixed packages 11
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | httpd | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | httpd-debuginfo | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | httpd-devel | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | httpd-filesystem | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | httpd-manual | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | httpd-tools | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | mod_ldap | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | mod_md | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | mod_proxy_html | 1:2.4.52-1.amzn2 |
| Amazon Linux · 2 | mod_session | 0:2.4.52-1.amzn2 |
| Amazon Linux · 2 | mod_ssl | 1:2.4.52-1.amzn2 |
Vulnerabilities 2
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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…
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Unscored —
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…