SB2017042607 - Path traversal in packages.debian dpkg

Description

This security bulletin contains information about 1 vulnerability.

1) Path traversal (CVE-ID: CVE-2017-8283)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

dpkg-source in dpkg 1.3.0 through 1.18.23 is able to use a non-GNU patch program and does not offer a protection mechanism for blank-indented diff hunks, which allows remote attackers to conduct directory traversal attacks via a crafted Debian source package, as demonstrated by use of dpkg-source on NetBSD.

Remediation

Install update from vendor's website.

References

• http://www.openwall.com/lists/oss-security/2017/04/20/2
• http://www.securityfocus.com/bid/98064