ALAS-2019-1311


Amazon Linux AMI Security Advisory: ALAS-2019-1311
Advisory Release Date: 2019-10-24 21:35 Pacific
Severity: Medium

Issue Overview:

A vulnerability was found in Apache httpd, in mod_http2. Under certain circumstances, HTTP/2 early pushes could lead to memory corruption, causing a server to crash.(CVE-2019-10081 )

A read-after-free vulnerability was discovered in Apache httpd, in mod_http2. A specially crafted http/2 client session could cause the server to read memory that was previously freed during connection shutdown, potentially leading to a crash.(CVE-2019-10082 )

A cross-site scripting vulnerability was found in Apache httpd, affecting the mod_proxy error page. Under certain circumstances, a crafted link could inject content into the HTML displayed in the error page, potentially leading to client-side exploitation.(CVE-2019-10092 )

A vulnerability was discovered in Apache httpd, in mod_remoteip. A trusted proxy using the "PROXY" protocol could send specially crafted headers that can cause httpd to experience a stack buffer overflow or NULL pointer dereference, leading to a crash or other potential consequences.\n\nThis issue could only be exploited by configured trusted intermediate proxy servers. HTTP clients such as browsers could not exploit the vulnerability.(CVE-2019-10097 )

A vulnerability was discovered in Apache httpd, in mod_rewrite. Certain self-referential mod_rewrite rules could be fooled by encoded newlines, causing them to redirect to an unexpected location. An attacker could abuse this flaw in a phishing attack or as part of a client-side attack on browsers.(CVE-2019-10098 )

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.(CVE-2019-9517 )


Affected Packages:

httpd24


Issue Correction:
Run yum update httpd24 to update your system.

New Packages:
i686:
    mod24_ssl-2.4.41-1.88.amzn1.i686
    mod24_proxy_html-2.4.41-1.88.amzn1.i686
    mod24_ldap-2.4.41-1.88.amzn1.i686
    httpd24-devel-2.4.41-1.88.amzn1.i686
    mod24_md-2.4.41-1.88.amzn1.i686
    httpd24-2.4.41-1.88.amzn1.i686
    httpd24-tools-2.4.41-1.88.amzn1.i686
    httpd24-debuginfo-2.4.41-1.88.amzn1.i686
    mod24_session-2.4.41-1.88.amzn1.i686

noarch:
    httpd24-manual-2.4.41-1.88.amzn1.noarch

src:
    httpd24-2.4.41-1.88.amzn1.src

x86_64:
    mod24_ssl-2.4.41-1.88.amzn1.x86_64
    httpd24-tools-2.4.41-1.88.amzn1.x86_64
    mod24_ldap-2.4.41-1.88.amzn1.x86_64
    mod24_session-2.4.41-1.88.amzn1.x86_64
    httpd24-2.4.41-1.88.amzn1.x86_64
    mod24_md-2.4.41-1.88.amzn1.x86_64
    httpd24-devel-2.4.41-1.88.amzn1.x86_64
    httpd24-debuginfo-2.4.41-1.88.amzn1.x86_64
    mod24_proxy_html-2.4.41-1.88.amzn1.x86_64