Flaw bug created to hold information about an old flaw we knew something about. For more details see the MITRE CVE description.
Stream.cc in Xpdf, as used in products such as gpdf, kpdf, pdftohtml, poppler, teTeX, CUPS, libextractor, and others, allows attackers to modify memory and possibly execute arbitrary code via a DCTDecode stream with (1) a large "number of components" value that is not checked by DCTStream::readBaselineSOF or DCTStream::readProgressiveSOF, (2) a large "Huffman table index" value that is not checked by DCTStream::readHuffmanTables, and (3) certain uses of the scanInfo.numComps value by DCTStream::readScanInfo.
Red Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.
Red Hat would like to thank Chris Evans for reporting this issue.