Red Hat update for Apache HTTP server

Published: 2017-08-16 15:40:31 | Updated: 2017-08-16 15:42:06
Severity Medium
Patch available YES
Number of vulnerabilities 4
CVSSv2 3.2 (AV:N/AC:M/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
3.2 (AV:N/AC:M/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
3.2 (AV:N/AC:M/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
3.7 (AV:N/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
CVSSv3 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
4.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
4.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE ID CVE-2017-3167
CVE-2017-3169
CVE-2017-7679
CVE-2017-9788
CWE ID CWE-592
CWE-125
CWE-200
Exploitation vector Network
Public exploit Not available
Vulnerable software Red Hat Enterprise Linux
Vulnerable software versions Red Hat Enterprise Linux 6
Vendor URL Red Hat Inc.
Advisory type Public

Security Advisory

1) Authentication bypass

Description

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.

Remediation

Install update from vendor's website.

External links

https://access.redhat.com/errata/RHSA-2017:2478

2) NULL pointer dereference

Description

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.

Remediation

Install update from vendor's website.

External links

https://access.redhat.com/errata/RHSA-2017:2478

3) Out-of-bounds read

Description

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.

Remediation

Install update from vendor's website.

External links

https://access.redhat.com/errata/RHSA-2017:2478

4) Information disclosure

Description

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.

External links

https://access.redhat.com/errata/RHSA-2017:2478

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