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[oCERT-2011-001] Chyrp input sanitization errors
From: Andrea Barisani <lcars () ocert org>
Date: Wed, 13 Jul 2011 22:17:30 +0200
#2011-001 Chyrp input sanitization errors
The Chyrp framework, an open source blogging engine, suffers from cross-site
scripting (XSS) and local file inclusion (LFI) vulnerabilities.
Insufficient input sanitization on the parameters passed to pages related to
be potentially exploited to hijack the session of the administrator.
Insufficient path sanitization on the root 'action' query string parameter
leads to inclusion of arbitrary files from local sources, this could be
exploited to read arbitrary accessible files on the hosting server filesystem
and potentially execute arbitrary commands or code.
Chyrp <= 2.1
Credit: vulnerability report and PoC code received from Eldar Marcussen
<wireghoul [at] justanotherhacker [dot] com>.
2011-05-17: vulnerability report received
2010-05-17: contacted chyrp maintainers
2010-07-13: oCERT advisory published jointly with reporter advisory
Andrea Barisani | Founder & Project Coordinator
oCERT | OSS Computer Security Incident Response Team
<lcars () ocert org> http://www.ocert.org
0x864C9B9E 0A76 074A 02CD E989 CE7F AC3F DA47 578E 864C 9B9E
"Pluralitas non est ponenda sine necessitate"
- [oCERT-2011-001] Chyrp input sanitization errors Andrea Barisani (Jul 13)