Apple Xcode before 4.4 does not properly compose a designated requirement (DR) during signing of programs that lack bundle identifiers, which allows remote attackers to read keychain entries via a crafted app, as demonstrated by the keychain entries of a (1) helper tool or (2) command-line tool.
The WOHyperlink implementation in WebObjects in Apple Xcode tools before 3.1 appends local session IDs to generated non-local URLs, which allows remote attackers to obtain potentially sensitive information by reading the requests for these URLs.