PatchTheCVECVE-2013-4122: Cyrus SASL 2.1.23, 2.1.26, and earlier does not properly handle when a NULL value is returned upon an error by
CVE-2013-4122 is a medium-severity flaw (CVSS 4.3) affecting cyrus-sasl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| EPSS exploit chance | 3.6% (top 11%) |
| CISA exploited list | No |
| Weakness | CWE-189 |
| Published | 2013-10-27 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2013-4122?
cyrus-sasl: upgrade to newer than 2.1.26. Exact commands for each OS are on this page.
Is CVE-2013-4122 being exploited?
CVE-2013-4122 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2013-4122 affect?
CVE-2013-4122 affects cyrus-sasl. Severity is medium (CVSS 4.3). 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 cra
How urgent is CVE-2013-4122?
Priority 42/100. Public exploit reference
Software pages
Related CVEs
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- CVE-2020-8032 MEDIUM 6.7 UPGRADE A Insecure Temporary File vulnerability in the packaging of cyrus-sasl of openSUSE Factory allows local attack
- CVE-2009-0688 HIGH 7.5 UPGRADE Multiple buffer overflows in the CMU Cyrus SASL library before 2.1.23 might allow remote attackers to execute