CVE-2011-1270 in PowerPoint
Summary
by MITRE
Buffer overflow in Microsoft PowerPoint 2002 SP3 and 2003 SP3 allows remote attackers to execute arbitrary code via a crafted PowerPoint document, aka "Presentation Buffer Overrun RCE Vulnerability."
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Analysis
by VulDB Data Team • 11/07/2021
The vulnerability identified as CVE-2011-1270 represents a critical buffer overflow flaw in Microsoft PowerPoint 2002 Service Pack 3 and PowerPoint 2003 Service Pack 3 applications. This security weakness resides in the application's handling of malformed presentation files, specifically within the PowerPoint document parsing mechanism that processes slide data structures. The flaw occurs when the application attempts to read and process specially crafted PowerPoint files that contain oversized data sequences in presentation elements such as text boxes, shapes, or embedded objects. This buffer overflow vulnerability falls under the common weakness enumeration CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations.
The technical exploitation of this vulnerability requires an attacker to craft a malicious PowerPoint document that triggers the buffer overflow condition during normal presentation rendering operations. When a user opens the malicious file, the PowerPoint application allocates insufficient memory buffers to accommodate the oversized data structures contained within the presentation. This memory corruption allows the attacker to overwrite critical memory segments including return addresses, function pointers, or other control data structures. The vulnerability specifically affects the PowerPoint application's slide parsing engine and occurs during the rendering of presentation elements that contain malformed data sequences exceeding allocated buffer boundaries. This condition creates an execution environment where arbitrary code can be injected and executed with the privileges of the user running the vulnerable application, making it particularly dangerous in enterprise environments where users may open untrusted presentation files.
The operational impact of CVE-2011-1270 extends beyond simple remote code execution to encompass significant risks for enterprise security infrastructure and user productivity. Attackers can leverage this vulnerability to deploy malware, establish persistent backdoors, or escalate privileges within affected systems. The vulnerability's remote exploitation capability means that attackers can compromise systems simply by enticing users to open malicious PowerPoint files through email attachments, web downloads, or network shares. In typical enterprise scenarios, this vulnerability can lead to complete system compromise, data exfiltration, and lateral movement within networks where users have elevated privileges. The vulnerability affects organizations that have not applied the necessary security patches, creating a persistent threat vector that can be exploited by both sophisticated attackers and automated malware campaigns. Security professionals should note that this vulnerability aligns with attack patterns documented in the MITRE ATT&CK framework under the T1059 technique for command and script interpreter execution, as successful exploitation typically results in code execution that can be leveraged for further attacks.
Mitigation strategies for CVE-2011-1270 require immediate patch deployment and comprehensive security hardening measures. Microsoft has released security updates that address this vulnerability through proper bounds checking and memory management improvements in the PowerPoint application. Organizations should prioritize immediate deployment of the applicable security patches and ensure that all users have updated their PowerPoint installations to versions that include the necessary fixes. Additional protective measures include implementing strict file validation policies that scan and quarantine suspicious presentation files, disabling automatic opening of attachments in email clients, and educating users about the risks of opening untrusted PowerPoint documents. Network-based protections such as content filtering and email scanning solutions should be configured to block potentially malicious PowerPoint files based on file signatures and heuristic analysis. Security monitoring should include detection of unusual PowerPoint process behavior and memory access patterns that might indicate exploitation attempts. The vulnerability also highlights the importance of maintaining up-to-date security patches across all Microsoft Office applications, as similar buffer overflow conditions may exist in other components of the Office suite that could provide alternative attack vectors for adversaries seeking to compromise enterprise environments through presentation-based attacks.