egg-compile.scm in CHICKEN 5.x before 5.3.1 allows arbitrary OS command execution during package installation via escape characters in a .egg file.Referenceshttps://lists.gnu.org/archive/html/chicken-announce/2022-11/msg00000.htmlhttps://code.call-cc.org/cgi-bin/gitweb.cgi?p=chicken-core.git%3Ba=blobdiff%3Bf=egg-compile.scm%3Bh=9ba4568113350ec75204cba55e43e27925e2d6fe%3Bhp=c1f2ceb0fb470f63c2ba2a1cf9d8d40083c2359f%3Bhb=a08f8f548d772ef410c672ba33a27108d8d434f3%3Bhpb=9c6fb001c25de4390f46ffd7c3c94237f4df92a9https://code.call-cc.org/cgi-bin/gitweb.cgi?p=chicken-core.git%3Ba=blobdiff%3Bf=NEWS%3Bh=54888afff09353093453673c407cabfe76a5ce77%3Bhp=a3fd88a892f82c8353267f50509d018bbb1934b9%3Bhb=670478435a982fc4d1f001ea08669f53d35a51cd%3Bhpb=a08f8f548d772ef410c672ba33a27108d8d434f3