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The png_do_expand_palette function in libpng before 1.6.8 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via (1) a PLTE chunk of zero bytes or (2) a NULL palette, related to pngrtran.c and pngset.c.

CVE-2013-6954 is a vulnerability in libpng versions prior to 1.6.8, specifically in the png_do_expand_palette function. Libpng is a widely used open-source library for handling PNG (Portable Network Graphics) image files. The vulnerability arises due to improper handling of the PLTE chunk, which defines the palette for indexed-color PNG images. When the PLTE chunk contains zero bytes or when a NULL palette is encountered, the function attempts to dereference a NULL pointer, leading to a denial of service (DoS) condition by crashing the application. This issue is rooted in the pngrtran.c and pngset.c source files of libpng. The vulnerability does not impact confidentiality or integrity but affects availability by causing application crashes. Exploitation requires no privileges and can be triggered remotely by supplying a crafted PNG image containing a malformed PLTE chunk. User interaction is required in the sense that the vulnerable application must process the malicious PNG file. The CVSS v3.1 base score is 6.5 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, but requiring user interaction and resulting in high impact on availability only. There are no known exploits in the wild, and no vendor or product specifics are provided, but the vulnerability affects any software using vulnerable libpng versions. The root cause is a NULL pointer dereference (CWE-476).

Detailed information about CVE-2013-6954: n/a in n/a affecting n/a n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2013-6954: n/a in n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2013-6954: n/a in n/a

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