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ppp: No denial of service vulnerability


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200411-01 / ppp
Release Date November 01, 2004
Latest Revision November 02, 2004: 02
Impact low
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)

Related bugreports: #69152


pppd contains a bug that allows an attacker to crash his own connection, but it cannot be used to deny service to other users.

2.  Impact Information


ppp is a Unix implementation of the Point-to-Point Protocol.


The pppd server improperly verifies header fields, potentially leading to a crash of the pppd process handling the connection. However, since a separate pppd process handles each ppp connection, this would not affect any other connection, or prevent new connections from being established.


We incorrectly thought that this bug could be exploited to deny service to all ppp users. It is not the case, this bug has no security impact whatsoever. Many thanks to Paul Mackerras from the Samba team for correcting our mistake.

3.  Resolution Information


There is no need for a workaround.


ppp users can keep their current versions.

4.  References


Page updated November 01, 2004

Summary: This is a Gentoo Linux Security Advisory

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