A vulnerability has been reported in HAProxy, which can be exploited by malicious people to potentially compromise a vulnerable system.
The vulnerability is caused due a boundary error when copying data into the trash buffer and can be exploited to cause a buffer overflow.
Successful exploitation may allow execution of arbitrary code, but requires that the global.tune.bufsize configuration option is set to a value greater than the default and that header rewriting is configured e.g. via the reqrep or rsprep directives.
The vulnerability is reported in version 1.4.20. Prior versions may also be affected.
Solution: Update to version 1.4.21.
Provided and/or discovered by: Reported by the vendor.
Original Advisory: http://haproxy.1wt.eu/download/1.4/src/CHANGELOG
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