SB2016041113 - Multiple vulnerabilities in Debian Linux

Description

This security bulletin contains information about 3 vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2012-6700)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The decode_search function in dhcp.c in dhcpcd 3.x does not properly free allocated memory, which allows remote DHCP servers to cause a denial of service via a crafted response.

2) Buffer overflow (CVE-ID: CVE-2012-6699)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The decode_search function in dhcp.c in dhcpcd 3.x allows remote DHCP servers to cause a denial of service (out-of-bounds read) via a crafted response.

3) Buffer overflow (CVE-ID: CVE-2012-6698)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The decode_search function in dhcp.c in dhcpcd 3.x allows remote DHCP servers to cause a denial of service (out-of-bounds write) via a crafted response.

Remediation

Install update from vendor's website.

References

• http://www.debian.org/security/2016/dsa-3534
• http://www.openwall.com/lists/oss-security/2015/12/02/1
• http://www.openwall.com/lists/oss-security/2015/12/03/1
• https://bugs.launchpad.net/ubuntu/+source/dhcpcd/+bug/1517226
• https://launchpadlibrarian.net/228152582/dhcp.c.patch