The is_path_absolute function in scheduler/client.c for the daemon in CUPS before 1.1.23 allows remote attackers to cause a denial of service (CPU consumption by tight loop) via a "..\.." URL in an HTTP request.

lppasswd in CUPS 1.1.22, when run in environments that do not ensure that file descriptors 0, 1, and 2 are open when lppasswd is called, does not verify that the passwd.new file is different from STDERR, which allows local users to control output to passwd.new via certain user input that triggers an error message.

lppasswd in CUPS 1.1.22 ignores write errors when modifying the CUPS passwd file, which allows local users to corrupt the file by filling the associated file system and triggering the write errors.

lppasswd in CUPS 1.1.22 does not remove the passwd.new file if it encounters a file-size resource limit while writing to passwd.new, which causes subsequent invocations of lppasswd to fail.

Buffer overflow in the ParseCommand function in hpgl-input.c in the hpgltops program for CUPS 1.1.22 allows remote attackers to execute arbitrary code via a crafted HPGL file.