Cyrus SASL 2.1.23, 2.1.26, and earlier does not properly handle when a NULL value is returned upon an error by the crypt function as implemented in glibc 2.17 and later, which allows remote attackers to cause a denial of service (thread crash and consumption) via (1) an invalid salt or, when FIPS-140 is enabled, a (2) DES or (3) MD5 encrypted password, which triggers a NULL pointer dereference.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2013-4122 from the MITRE CVE dictionary dictionary and NIST NVD.
Not Vulnerable. This issue does not affect the version of cyrus-sasl package as shipped with Red Hat Enterprise Linux 5 and 6.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 5 |
|---|---|
| Base Metrics | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss EWS 2 | cyrus-sasl | Not affected |
| Red Hat JBoss EAP 6 | cyrus-sasl | Not affected |
| Red Hat JBoss EAP 5 | cyrus-sasl | Not affected |
| Red Hat Enterprise Linux 7 | cyrus-sasl | Not affected |
| Red Hat Enterprise Linux 6 | cyrus-sasl | Not affected |
| Red Hat Enterprise Linux 5 | cyrus-sasl | Not affected |
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