Several security related problems have been discovered in webcalendar, a PHP based multi-user calendar. The Common Vulnerabilities and Exposures project identifies the following vulnerabilities:
Multiple SQL injection vulnerabilities allow remote attackers to execute arbitrary SQL commands.
Missing input sanitising allows an attacker to overwrite local files.
A CRLF injection vulnerability allows remote attackers to modify HTTP headers and conduct HTTP response splitting attacks.
The old stable distribution (woody) does not contain webcalendar packages.
For the stable distribution (sarge) these problems have been fixed in version 0.9.45-4sarge3.
For the unstable distribution (sid) these problems have been fixed in version 1.0.2-1.
We recommend that you upgrade your webcalendar package.
MD5 checksums of the listed files are available in the original advisory.