CVE-2015-8768

moderate-risk
Published 2017-02-13

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.

Do I need to act?

~
1.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (3)

Click

Affected Vendors

Canonical Click Project

References (16)

http://bazaar.launchpad.net/~click-hackers/click/devel/revision/587
Third Party Advisory http://ubuntu.com/usn/usn-2771-1
Mailing List http://www.openwall.com/lists/oss-security/2016/01/12/8
Third Party Advisory http://www.securityfocus.com/bid/96386
Issue Tracking https://bugs.launchpad.net/ubuntu/+source/click/+bug/1506467
Issue Tracking 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
Third Party Advisory http://ubuntu.com/usn/usn-2771-1
Mailing List http://www.openwall.com/lists/oss-security/2016/01/12/8
Third Party Advisory http://www.securityfocus.com/bid/96386
Issue Tracking https://bugs.launchpad.net/ubuntu/+source/click/+bug/1506467
Issue Tracking 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
45
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 4/34 · Minimal
Exposure 9/34 · Low