oss-security - Re: CVE-2019-18634: buffer overflow in sudo when pwfeedback is enabled

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Message-ID: <aff3405caaf3e70f@sudo.ws>
Date: Wed, 05 Feb 2020 11:22:45 -0700
From: "Todd C. Miller" <Todd.Miller@...o.ws>
To: oss-security@...ts.openwall.com
Subject: Re: CVE-2019-18634: buffer overflow in sudo when pwfeedback is enabled

On Wed, 05 Feb 2020 22:34:53 +1100, William Bowling wrote:

> When using a pty, sudo_term_eof and sudo_term_kill are initialized to 0x4
> and 0x15 allowing the overflow to be reached, making 1.8.26-1.8.30 also
> vulnerable:

Thanks for sharing the pty exploitation method.  I've updated the
details in https://www.sudo.ws/alerts/pwfeedback.html to make it
clear that the bug is not specific to piped input.

 - todd

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