Vulnerabilities > CVE-2012-2317 - Cryptographic Issues vulnerability in multiple products
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
NONE Summary
The Debian php_crypt_revamped.patch patch for PHP 5.3.x, as used in the php5 package before 5.3.3-7+squeeze4 in Debian GNU/Linux squeeze, the php5 package before 5.3.2-1ubuntu4.17 in Ubuntu 10.04 LTS, and the php5 package before 5.3.5-1ubuntu7.10 in Ubuntu 11.04, does not properly handle an empty salt string, which might allow remote attackers to bypass authentication by leveraging an application that relies on the PHP crypt function to choose a salt for password hashing.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 2 | |
| Application | 4 | |
| OS | 1 | |
| OS | 2 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Signature Spoofing by Key Recreation An attacker obtains an authoritative or reputable signer's private signature key by exploiting a cryptographic weakness in the signature algorithm or pseudorandom number generation and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
Nessus
| NASL family | Ubuntu Local Security Checks |
| NASL id | UBUNTU_USN-1481-1.NASL |
| description | It was discovered that PHP incorrectly handled certain Tidy::diagnose operations on invalid objects. A remote attacker could use this flaw to cause PHP to crash, leading to a denial of service. (CVE-2012-0781) It was discovered that PHP incorrectly handled certain multi-file upload filenames. A remote attacker could use this flaw to cause a denial of service, or to perform a directory traversal attack. (CVE-2012-1172) Rubin Xu and Joseph Bonneau discovered that PHP incorrectly handled certain Unicode characters in passwords passed to the crypt() function. A remote attacker could possibly use this flaw to bypass authentication. (CVE-2012-2143) It was discovered that a Debian/Ubuntu specific patch caused PHP to incorrectly handle empty salt strings. A remote attacker could possibly use this flaw to bypass authentication. This issue only affected Ubuntu 10.04 LTS and Ubuntu 11.04. (CVE-2012-2317) It was discovered that PHP, when used as a stand alone CGI processor for the Apache Web Server, did not properly parse and filter query strings. This could allow a remote attacker to execute arbitrary code running with the privilege of the web server, or to perform a denial of service. Configurations using mod_php5 and FastCGI were not vulnerable. (CVE-2012-2335, CVE-2012-2336) Alexander Gavrun discovered that the PHP Phar extension incorrectly handled certain malformed TAR files. A remote attacker could use this flaw to perform a denial of service, or possibly execute arbitrary code. (CVE-2012-2386). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 59603 |
| published | 2012-06-20 |
| reporter | Ubuntu Security Notice (C) 2012-2019 Canonical, Inc. / NASL script (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/59603 |
| title | Ubuntu 8.04 LTS / 10.04 LTS / 11.04 / 11.10 / 12.04 LTS : php5 vulnerabilities (USN-1481-1) |
| code | |