CVE-2003-0146 in NetPBM
Summary
by MITRE
Multiple vulnerabilities in NetPBM 9.20 and earlier, and possibly other versions, may allow remote attackers to cause a denial of service or execute arbitrary code via "maths overflow errors" such as (1) integer signedness errors or (2) integer overflows, which lead to buffer overflows.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 08/24/2025
The vulnerability identified as CVE-2003-0146 represents a critical security flaw affecting NetPBM image processing software versions 9.20 and earlier, with potential impacts extending to other versions within the affected family. This vulnerability stems from inadequate input validation and mathematical operation handling within the software's core processing routines, creating a pathway for malicious actors to exploit fundamental computational errors that can escalate into serious security breaches. The affected software operates as a suite of tools for converting between different image formats and performing image manipulations, making it a widely used component in various computing environments including web servers, image processing pipelines, and automated systems that handle user-uploaded content.
The technical implementation of this vulnerability involves several interconnected mathematical error conditions that create cascading security risks. The primary issue manifests through integer signedness errors where signed and unsigned integer variables are improperly handled during mathematical operations, leading to unexpected behavior when processing image dimensions or pixel data. Additionally, integer overflow conditions occur when arithmetic operations exceed the maximum representable values for the data types involved, causing the software to allocate insufficient memory buffers or calculate incorrect array indices. These mathematical errors directly translate into buffer overflow conditions where the software attempts to write data beyond the allocated memory boundaries, creating opportunities for memory corruption that can be exploited by attackers to execute arbitrary code or induce denial of service conditions.
The operational impact of this vulnerability extends beyond simple system crashes or service interruptions, as it provides attackers with potential pathways to achieve remote code execution on vulnerable systems. When an attacker submits specially crafted image files containing malformed dimensions or mathematical values, the software's failure to properly validate these inputs during processing can result in memory corruption that allows for code injection attacks. The vulnerability affects systems where NetPBM is used to process user-uploaded content or handle image data from untrusted sources, creating exposure in web applications, automated image processing services, and networked systems that rely on proper input validation. This makes the vulnerability particularly dangerous in environments where the software operates with elevated privileges or where it processes images from diverse and potentially malicious sources.
Mitigation strategies for CVE-2003-0146 require immediate software updates to versions that address the underlying mathematical error handling issues, as well as comprehensive input validation measures that prevent malformed data from reaching the vulnerable processing routines. System administrators should implement strict image validation protocols that verify file dimensions, pixel counts, and mathematical parameters before processing, while also applying memory protection mechanisms such as stack canaries and address space layout randomization to reduce exploitability. The vulnerability aligns with CWE-190, which describes integer overflow and underflow conditions, and CWE-121, which covers stack-based buffer overflow scenarios. From an ATT&CK framework perspective, this vulnerability maps to techniques involving code injection and privilege escalation, with potential TTPs including T1059 for command and scripting interpreter usage and T1203 for exploitation for privilege escalation. Organizations should also consider implementing network segmentation and access controls to limit exposure, while establishing robust monitoring systems to detect potential exploitation attempts through unusual memory allocation patterns or process behavior anomalies.