SB2017081606 - Red Hat update for Apache HTTP server
Published: August 16, 2017
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Authentication bypass (CVE-ID: CVE-2017-3167)
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to usage of the ap_get_basic_auth_pw() function by third-party modules outside of the authentication phase. A remote attacker can create a specially crafted HTTP request to vulnerable web server, bypass authentication requirements and gain unauthorized access to otherwise protected information.
2) NULL pointer dereference (CVE-ID: CVE-2017-3169)
The vulnerability allows a remote attacker to perform denial of service attack.
The vulnerability exists due to a NULL pointer dereference error within mod_ssl module, when third-party modules call ap_hook_process_connection() function during an HTTP request to an HTTPS port. A remote attacker can send a specially crafted HTTP request and crash the affected web server.
3) Out-of-bounds read (CVE-ID: CVE-2017-7679)
The vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to out-of-bounds read within the mod_mime when constructing Content-Type response header. A remote attacker read one byte pas the end of a buffer when sending a malicious Content-Type response header.
4) Information disclosure (CVE-ID: CVE-2017-9788)
The vulnerability allows a remote unauthenticated attacker to obtain potentially sensitive information on the targeted system.The weakness exists due to improper initialization of the value placeholder in [Proxy-]Authorization headers of type 'Digest' before or between successive key=value assignments by mod_auth_digest. A remote attacker can provide an initial key with no '=' assignment to cause the stale value of uninitialized pool memory used by the prior request to leak.
Successful exploitation of the vulnerability results in information disclosure.
Remediation
Install update from vendor's website.