Vulnerability in FreeBSD
CVE-2009-3527
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.
Vulnerability class: Race Condition
Published · last modified .
CVSS v2 metric
CVSS v2 base score 6.9 (Medium). Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.006 (44.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- FreeBSD — versions 6.3, 6.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id (Patch, vdb-entry)
- security.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.asc (vendor-advisory, Patch)
- osvdb.org/58544 (vdb-entry)
- www.securityfocus.com/archive/1/506449 (mailing-list, Exploit)
- www.securityfocus.com/bid/36375 (Patch, vdb-entry)
Frequently asked questions
- What is CVE-2009-3527?
- CVE-2009-3527 is a vulnerability in FreeBSD, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). Published 2009-10-06.
- Is CVE-2009-3527 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.