CVE-2017-18123 — The call parameter of /lib/exe/ajax

The call parameter of /lib/exe/ajax.php in DokuWiki through 2017-02-19e does not properly encode user input, which leads to a reflected file download vulnerability, and allows remote attackers to run arbitrary programs.

01What is this vulnerability?

The call parameter of /lib/exe/ajax.php in DokuWiki through 2017-02-19e does not properly encode user input, which leads to a reflected file download vulnerability, and allows remote attackers to run arbitrary programs.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-02-03T03:00:00.000Z
• Last modified: 2024-08-05T21:13:48.188Z

09References

• github.com — https://github.com/splitbrain/dokuwiki/pull/2019
• vulnhive.com — https://vulnhive.com/2018/000004
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/02/msg00004.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/07/msg00004.html
• github.com — https://github.com/splitbrain/dokuwiki/commit/238b8e878ad48f370903465192b57c2072…
• hackerone.com — https://hackerone.com/reports/238316
• github.com — https://github.com/splitbrain/dokuwiki/issues/2029