In Pure-FTPd before 1.0.50, an incorrect maxfilesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.)

An issue was discovered in Pure-FTPd 1.0.49. An out-of-bounds (OOB) read has been detected in the purestrcmp function in utils.c.

An issue was discovered in Pure-FTPd 1.0.49. An uninitialized pointer vulnerability has been detected in the diraliases linked list. When the lookupalias(const char alias) or printaliases(void) function is called, they fail to correctly detect the end of the linked list and try to access a non-existent list member. This is related to initaliases in diraliases.c.

pure-ftpd before 1.0.52 is vulnerable to Buffer Overflow. There is an out of bounds read in the domlsd() function of the ls.c file.

The acceptclient function in PureFTPd 1.0.18 and earlier allows remote attackers to cause a denial of service by exceeding the maximum number of connections.

Directory traversal vulnerability in pure-FTPd 1.0.22 and possibly other versions, when running on SUSE Linux Enterprise Server and possibly other operating systems, when the Netware OES remote server feature is enabled, allows local users to overwrite arbitrary files via unknown vectors.

Pure-FTPd has released version 1.0.30 which fixes a STARTTLS flaw similar to Postfix's CVE-2011-0411 [1]. Upgrading is recommended.

References:

[1] http://www.pureftpd.org/project/pure-ftpd/news

pure-ftpd 1.0.22, as used in SUSE Linux Enterprise Server 10 SP3 and SP4, and Enterprise Desktop 10 SP3 and SP4, when running OES Netware extensions, creates a world-writeable directory, which allows local users to overwrite arbitrary files and gain privileges via unspecified vectors.

Multiple libc/glob(3) flaws were reported [1] that affect various BSD libc implementations. In particular, globs containing braces could lead to resource exhaustion.

One such vulnerable application is Pure-FTPd. This has been corrected in upstream version 1.0.32, where support for braces expansion in directory listings was disabled.

[1] http://securityreason.com/achievementsecurityalert/97 [2] http://www.pureftpd.org/project/pure-ftpd/news

Downstream version 1.0.46-1 of pure-ftpd as shipped in Fedora was vulnerable to packaging error due to which the original configuration was ignored after update and service started running with default configuration. This has security implications because of overriding security-related configuration. This issue doesn't affect upstream version of pure-ftpd.

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Pure-FTPd 1.0.48 allows remote attackers to prevent legitimate server use by making enough connections to exceed the connection limit.