Description
ikiwiki 3.20161219 does not properly check if a revision changes the access permissions for a page on sites with the git and recentchanges plugins and the CGI interface enabled, which allows remote attackers to revert certain changes by leveraging permissions to change the page before the revision was made.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ikiwiki | 3.20161219 | — |
| Debian 13 | ikiwiki | 3.20161219 | — |
| Debian 12 | ikiwiki | 3.20161219 | — |
| Debian 8 | ikiwiki | 3.20141016.4 | DSA-3760-1 |
| Debian 7 | ikiwiki | 3.20120629.2+deb7u2 | DLA-812-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | ikiwiki | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ikiwiki | 3.20200202.3-2.7 | openSUSE-SU-2024:10860-1 |
Advisories 3
- DLA-812-1 ikiwiki - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3760-1 ikiwiki - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10860-1 ikiwiki-3.20200202.3-2.7 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://ikiwiki.info/bugs/rcs_revert_can_bypass_authorization_if_affected_files_were_renamed/
- https://ikiwiki.info/security/#index46h2
- DSA-3760 vendor-advisory
- [oss-security] 20161221 Re: CVE request: ikiwiki: authorization bypass when reverting changes mailing-list
- [oss-security] 20161229 ikiwiki: CVE-2016-9645 (incomplete fix for CVE-2016-10026), CVE-2016-9646 (commit metadata forgery) mailing-list