pnmtopng in netpbm before 10.25, when using the -trans option, uses uninitialized size and index variables when converting Portable Anymap (PNM) images to Portable Network Graphics (PNG), which might allow attackers to execute arbitrary code by modifying the stack.

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.

pstopnm in netpbm does not properly use the "-dSAFER" option when calling Ghostscript to convert a PostScript file into a (1) PBM, (2) PGM, or (3) PNM file, which allows external user-assisted attackers to execute arbitrary commands.

Marc Schoenefeld found a stack-based buffer overflow in the way netpbm graphics file formats handling library used to process content of header fields of the X PixMap (XPM) image file. A remote attacker could provide a specially-crafted XPM image file and trick the local user into processing it, which would lead to denial of service (crash of application using the netpbm library) or, potentially, to execution of arbitrary code with the privileges of that application.

Buffer overflow in pamtofits of NetPBM 10.30 through 10.33 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code when assembling the header, possibly related to an off-by-one error.

Multiple buffer overflows in pnmtopng in netpbm 10.0 and earlier allow attackers to execute arbitrary code via a crafted PNM file.

netpbm 9.25 and earlier does not properly create temporary files, which allows local users to overwrite arbitrary files.