CVE-2017-1000254 log

Severity Low
Remote Yes
Type Denial of service
When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the `PWD` command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path. A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault.
Group Package Affected Fixed Severity Status Ticket
AVG-422 curl 7.55.1-1 7.56.0-1 Low Fixed
AVG-389 libcurl-compat 7.54.1-1 7.56.0-1 Medium Fixed
AVG-388 lib32-libcurl-compat 7.54.1-1 7.56.0-1 Medium Fixed
AVG-387 libcurl-gnutls 7.54.1-1 7.56.0-1 Medium Fixed
AVG-386 lib32-libcurl-gnutls 7.54.1-1 7.56.0-1 Medium Fixed
AVG-371 lib32-curl 7.54.1-2 7.56.0-1 Medium Fixed
Date Advisory Group Package Severity Type
05 Oct 2017 ASA-201710-7 AVG-389 libcurl-compat Medium multiple issues
05 Oct 2017 ASA-201710-6 AVG-388 lib32-libcurl-compat Medium multiple issues
05 Oct 2017 ASA-201710-5 AVG-387 libcurl-gnutls Medium multiple issues
05 Oct 2017 ASA-201710-4 AVG-386 lib32-libcurl-gnutls Medium multiple issues
05 Oct 2017 ASA-201710-3 AVG-371 lib32-curl Medium multiple issues
05 Oct 2017 ASA-201710-2 AVG-422 curl Low denial of service
Introduced by
Affected versions: libcurl 7.7 to and including 7.55.1
Not affected versions: libcurl < 7.7 and >= 7.56.0