CVE-2015-8768
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.75%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.75% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- click project/click · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- http://bazaar.launchpad.net/~click-hackers/click/devel/revision/587
- http://ubuntu.com/usn/usn-2771-1Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/12/8Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/96386Third Party Advisory, VDB Entry
- https://bugs.launchpad.net/ubuntu/+source/click/+bug/1506467Issue Tracking, Patch, Third Party Advisory
- https://code.launchpad.net/~cjwatson/click/audit-missing-dot-slash/+merge/274554Issue Tracking, Patch, Third Party Advisory
- 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-2771-1Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/01/12/8Mailing List, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/96386Third Party Advisory, VDB Entry
- https://bugs.launchpad.net/ubuntu/+source/click/+bug/1506467Issue Tracking, Patch, Third Party Advisory
- https://code.launchpad.net/~cjwatson/click/audit-missing-dot-slash/+merge/274554Issue Tracking, Patch, Third Party Advisory
- https://insights.ubuntu.com/2015/10/15/update-on-ubuntu-phone-security-issue/
- https://plus.google.com/+SzymonWaliczek/posts/3jbG2uiAniF
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.