NULL pointer dereference in Microsoft .Net Framework
CVE-2011-1271
The JIT compiler in Microsoft .NET Framework 3.5 Gold and SP1, 3.5.1, and 4.0, when IsJITOptimizerDisabled is false, does not properly handle expressions related to null strings, which allows context-dependent attackers to bypass intended access restrictions, and consequently execute arbitrary code, in opportunistic circumstances by leveraging a crafted application, as demonstrated by (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka ".NET Framework JIT Optimization Vulnerability."
EPSS: 0.201 (97.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L.
Affected products
- Microsoft .Net_framework — versions 4.0, 3.5.1, 2.0
- Microsoft Windows_2003_server
- Microsoft Windows_7
- Microsoft Windows_server_2003
- Microsoft Windows_server_2008 — versions r2
- Microsoft Windows_vista
- Microsoft Windows_xp
- N/a — versions n/a
Weakness classification (CWE)
References
- secure@microsoft.com (signature, x_refsource_OVAL, vdb-entry)
- secure@microsoft.com (x_refsource_MS, vendor-advisory)
- secure@microsoft.com (Exploit, x_refsource_MISC)
Frequently asked questions
- What is CVE-2011-1271?
- CVE-2011-1271 is a high-severity vulnerability in Microsoft .Net Framework, classified under CWE-264. CVSS score: 7.7/10. Published 2011-05-10.
- How severe is CVE-2011-1271?
- High severity. CVSS v3 base score is 7.7 out of 10.