CVE-2015-8768

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-02-13 · updated 2026-06-17
Weakness: CWE-264

Description

click/install.py in click does not require files in package filesystem tarballs to start with ./ (dot slash), which allows remote attackers to install an alternate security policy and gain privileges via a crafted package, as demonstrated by the test.mmrow app for Ubuntu phone.

Affected products

Canonical Ubuntu Linux: 14.04, 15.04
Click Project Click: all versions

References

http://bazaar.launchpad.net/~click-hackers/click/devel/revision/587
http://ubuntu.com/usn/usn-2771-1
http://www.openwall.com/lists/oss-security/2016/01/12/8
http://www.securityfocus.com/bid/96386
https://bugs.launchpad.net/ubuntu/+source/click/+bug/1506467
https://code.launchpad.net/~cjwatson/click/audit-missing-dot-slash/+merge/274554
https://insights.ubuntu.com/2015/10/15/update-on-ubuntu-phone-security-issue/
https://plus.google.com/+SzymonWaliczek/posts/3jbG2uiAniF
http://bazaar.launchpad.net/~click-hackers/click/devel/revision/587
http://ubuntu.com/usn/usn-2771-1
http://www.openwall.com/lists/oss-security/2016/01/12/8
http://www.securityfocus.com/bid/96386

Get alerted when CVE-2015-8768 or the next vulnerability affects your stack