This is a security release fixing the following list of issues:
Submodule URLs and paths with a leading "-" are now ignored.
This is due to the recently discovered CVE-2018-17456, which
can lead to arbitrary code execution in upstream git. While
libgit2 itself is not vulnerable, it can be used to inject
options in an implementation which performs a recursive clone
by executing an external command.
When running repack while doing repo writes,
packfile_load__cb()could see some temporary files in the
directory that were bigger than the usual, and makes
overflow on the
p->pack_namestring. This issue was reported
and fixed by bisho.
The configuration file parser used unbounded recursion to parse
multiline variables, which could lead to a stack overflow. The
issue was reported by the oss-fuzz project, issue 10048 and
fixed by Nelson Elhage.
The fix to the unbounded recursion introduced a memory leak in
the config parser. While this leak was never in a public
release, the oss-fuzz project reported this as issue 10127. The
fix was implemented by Nelson Elhage and Patrick Steinhardt.
When parsing "ok" packets received via the smart protocol, our
parsing code did not correctly verify the bounds of the
packets, which could result in a heap-buffer overflow. The
issue was reported by the oss-fuzz project, issue 9749 and
fixed by Patrick Steinhardt.
The parsing code for the smart protocol has been tightened in
general, fixing heap-buffer overflows when parsing the packet
type as well as for "ACK" and "unpack" packets. The issue was
discovered and fixed by Patrick Steinhardt.
Fixed potential integer overflows on platforms with 16 bit
integers when parsing packets for the smart protocol. The issue
was discovered and fixed by Patrick Steinhardt.
Fixed potential NULL pointer dereference when parsing
configuration files which have "include.path" or
"includeIf..path" statements without a value.