Gentoo: GLSA-201606-08 Moderate Risks Posed by DHCP Client Escalation
gentoo
June 18, 2016
Multiple vulnerabilities have been found in dhcpcd allowing remote attackers to possibly execute arbitrary code or cause a Denial of Service
Summary
A heap overflow can be trigged via malformed DHCP responses in the print_option (via dhcp_envoption1) due to incorrect option length values. These vulnerabilities could also allow remote attackers to trigger an invalid read/crash via malformed DHCP responses.
Resolution
All dhcpcd users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/dhcpcd-6.10.0â€
References
[ 1 ] CVE-2016-1503 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1503 [ 2 ] CVE-2016-1504 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1504
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201606-07
style>.gentoo_availability{display:block;}
Concerns
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
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Severity: Normal
Title: dhcpcd: Multiple vulnerabilities
Date: June 18, 2016
Bugs: #571152
ID: 201606-07
Background
A fully featured, yet light weight RFC2131 compliant DHCP client
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Affected Packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/dhcpcd < 6.10.0 >= 6.10.0
Impact
=====
Remote attackers could possibly execute arbitrary code with the
privileges of the process or cause Denial of Service.
Workaround
There is no known workaround at this time.
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