Ubuntu Security Notice USN-6885-3 ≈ Packet Storm

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Ubuntu Security Notice USN-6885-3^[6]: Authored by Ubuntu ^[7] | Site security.ubuntu.com ^[8]; Ubuntu Security Notice 6885-3 - USN-6885-1 fixed several vulnerabilities in Apache. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Orange Tsai discovered that the Apache HTTP Server mod_rewrite module incorrectly handled certain substitutions. A remote attacker could possibly use this issue to execute scripts in directories not directly reachable by any URL, or cause a denial of service. Some environments may require using the new UnsafeAllow3F flag to handle unsafe substitutions.; systems | linux ^[9], ubuntu ^[10]; advisories | CVE-2024-38474 ^[11], CVE-2024-38476 ^[12], CVE-2024-38477 ^[13]; SHA-256 | 31166839dd976fb13f0b4dbd232274dc5adcbdb22f6e4157c52f92b68f799311; Download ^[14] | Favorite ^[15] | View ^[16]

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Ubuntu Security Notice USN-6885-3
September 18, 2024
apache2 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in Apache HTTP Server.
Software Description:
- apache2: Apache HTTP server
Details:
USN-6885-1 fixed several vulnerabilities in Apache. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Original advisory details:
Orange Tsai discovered that the Apache HTTP Server mod_rewrite module
incorrectly handled certain substitutions. A remote attacker could
possibly use this issue to execute scripts in directories not directly
reachable by any URL, or cause a denial of service. Some environments
may require using the new UnsafeAllow3F flag to handle unsafe
substitutions. (CVE-2024-38474, CVE-2024-38475)
Orange Tsai discovered that the Apache HTTP Server incorrectly handled
certain response headers. A remote attacker could possibly use this issue
to obtain sensitive information, execute local scripts, or perform SSRF
attacks. (CVE-2024-38476)
Orange Tsai discovered that the Apache HTTP Server mod_proxy module
incorrectly handled certain requests. A remote attacker could possibly use
this issue to cause the server to crash, resulting in a denial of service.
(CVE-2024-38477)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS
apache2                         2.4.29-1ubuntu4.27+esm3
Available with Ubuntu Pro
Ubuntu 16.04 LTS
apache2                         2.4.18-2ubuntu3.17+esm13
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6885-3
https://ubuntu.com/security/notices/USN-6885-2
https://ubuntu.com/security/notices/USN-6885-1
CVE-2024-38474, CVE-2024-38475, CVE-2024-38476, CVE-2024-38477