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Revision:  514783
Date:      2019-10-19
Time:      09:52:18Z
Committer: wen

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VuXML IDDescription
3dd6ccf4-a3c6-11e7-a52e-0800279f2ff8OpenVPN -- out-of-bounds write in legacy key-method 1

Steffan Karger reports:

The bounds check in read_key() was performed after using the value, instead of before. If 'key-method 1' is used, this allowed an attacker to send a malformed packet to trigger a stack buffer overflow. [...]

Note that 'key-method 1' has been replaced by 'key method 2' as the default in OpenVPN 2.0 (released on 2005-04-17), and explicitly deprecated in 2.4 and marked for removal in 2.5. This should limit the amount of users impacted by this issue.


Discovery 2017-09-21
Entry 2017-09-27
openvpn-polarssl
lt 2.3.18

openvpn-mbedtls
ge 2.4.0 lt 2.4.4

openvpn
ge 2.4.0 lt 2.4.4

lt 2.3.18

https://community.openvpn.net/openvpn/wiki/CVE-2017-12166
https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg15492.html
CVE-2017-12166