Debian: DSA-4633-1 Critical Fix for Curl Buffer Overflow and DoS

CVE-2019-5436

A heap buffer overflow in the TFTP receiving code was discovered,
which could allow DoS or arbitrary code execution. This only affects
the oldstable distribution (stretch).

CVE-2019-5481

Thomas Vegas discovered a double-free in the FTP-KRB code, triggered
by a malicious server sending a very large data block.

CVE-2019-5482

Thomas Vegas discovered a heap buffer overflow that could be
triggered when a small non-default TFTP blocksize is used.

For the oldstable distribution (stretch), these problems have been fixed
in version 7.52.1-5+deb9u10.

For the stable distribution (buster), these problems have been fixed in
version 7.64.0-4+deb10u1.

We recommend that you upgrade your curl packages.

For the detailed security status of curl please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/curl

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions c...