CVE-2018-11657
Description
ngiflib.c in MiniUPnP ngiflib 0.4 has an infinite loop in DecodeGifImg and LoadGif.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
MiniUPnP ngiflib 0.4 has an infinite loop in DecodeGifImg and LoadGif when processing crafted GIF files, causing denial of service.
Vulnerability
The infinite loop vulnerability exists in the DecodeGifImg and LoadGif functions in ngiflib.c. When processing a specially crafted GIF image, the loop condition never terminates, leading to indefinite execution. This affects ngiflib version 0.4 as distributed in MiniUPnP. [1]
Exploitation
An attacker can exploit this by providing a malicious GIF image to any application that uses the ngiflib library to parse GIF files. No authentication or special privileges are required; the attacker simply needs to deliver the crafted image to the vulnerable function. [1]
Impact
Successful exploitation results in a denial of service (DoS) condition. The infinite loop consumes CPU resources indefinitely, potentially causing the application or system to become unresponsive. [1]
Mitigation
As of the publication date, no official patch has been released for this issue. Users are advised to avoid processing untrusted GIF images with ngiflib 0.4. If possible, use an alternative library for GIF parsing. [1]
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
20.1, 0.2, 0.4+ 1 more
- (no CPE)range: 0.1, 0.2, 0.4
- (no CPE)range: =0.4
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- github.com/miniupnp/ngiflib/issues/7mitrex_refsource_MISC
News mentions
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