Dash: dash: heap out-of-bounds write in conv_escape via undersized unicode escape reservation

A flaw was found in dash. The printf builtin reserves four bytes before converting a Unicode \u or \U escape, but the multi-byte token can need five or six bytes. A local user who can supply such an escape to dash printf or echo %b, including through dash -c and a positional argument, can write one or two bytes past that reservation.

Dash: dash: super-polynomial backtracking in pmatch when libc fnmatch is disabled

A flaw was found in dash. When built without libc fnmatch, the internal pmatch() matcher implements * by unbounded recursion over candidate positions. A local user who can plant filenames, or otherwise feed that matcher, can make a short multi-star pattern such as *.*.*.*.*.tar.gz consume excessive CPU.

Untrusted search path vulnerability in dash 0.5.4, when used as a login shell, allows local users to execute arbitrary code via a Trojan horse .profile file in the current working directory.

An issue was discovered in Decentralized Anonymous Payment System (DAPS) through 2019-08-26. It is possible to force wallets to send HTTP requests to arbitrary locations, both on the local network and on the internet. This is a serious threat to user privacy, since it can possibly leak their IP address and the fact that they are using the product. This also affects Dash Core through 0.14.0.3 and Private Instant Verified Transactions (PIVX) through 3.4.0.