privoxy: invalid read via empty host header in client request

The client_host function in parsers.c in Privoxy before 3.0.24 allows remote attackers to cause a denial of service (invalid read and crash) via an empty HTTP Host header.

privoxy: potential flaws fixed in version 3.0.22

Memory leak in the rfc2553_connect_to function in jbsocket.c in Privoxy before 3.0.22 allows remote attackers to cause a denial of service (memory consumption) via a large number of requests that are rejected because the socket limit is reached.

privoxy: several use-after-free issues in list.c

Multiple use-after-free vulnerabilities in Privoxy before 3.0.22 allow remote attackers to have unspecified impact via vectors related to (1) the unmap function in list.c or (2) "two additional unconfirmed use-after-free complaints made by Coverity scan." NOTE: some of these details are obtained from third party information.

privoxy: denial of service (file descriptor consumption) via unspecified vectors

Privoxy before 3.0.22 allows remote attackers to cause a denial of service (file descriptor consumption) via unspecified vectors. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

privoxy: denial of service in case of client requests with incorrect chunk-encoded body

jcc.c in Privoxy before 3.0.23 allows remote attackers to cause a denial of service (abort) via a crafted chunk-encoded body.

privoxy: denial of service (segmentation faults, memory leaks) issues in pcrs.c

Multiple unspecified vulnerabilities in pcrs.c in Privoxy before 3.0.23 allow remote attackers to cause a denial of service (segmentation fault or memory consumption) via unspecified vectors.

privoxy: denial of service (invalid memory read) issue in parsers.c

parsers.c in Privoxy before 3.0.23 allows remote attackers to cause a denial of service (invalid read and crash) via vectors related to an HTTP time header.

privoxy: invalid reads in case of corrupt chunk-encoded content

The remove_chunked_transfer_coding function in filters.c in Privoxy before 3.0.24 allows remote attackers to cause a denial of service (invalid read and crash) via crafted chunk-encoded content.

privoxy: Proxy-Authentication response spoofing

Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.

An XSS vulnerability was found in Privoxy which was fixed in cgi_error_no_template() by encode the template name when Privoxy is configured to servce the user-manual itself.

A memory leak vulnerability was found in Privoxy when handling errors.

A vulnerability was found in Privoxy which was fixed in process_encrypted_request_headers() by freeing header memory when failing to get the request destination.

A vulnerability was found in Privoxy which was fixed in get_url_spec_param() by freeing memory of compiled pattern spec before bailing.

A flaw was found in privoxy before 3.0.32. Invalid memory access with an invalid pattern passed to pcre_compile() may lead to denial of service.

A flaw was found in privoxy before 3.0.32. A invalid read of size two may occur in chunked_body_is_complete() leading to denial of service.

A flaw was found in privoxy before 3.0.32. A crash may occur due a NULL-pointer dereference when the socks server misbehaves.

A flaw was found in privoxy before 3.0.32. A crash can occur via a crafted CGI request if Privoxy is toggled off.

A flaw was found in privoxy before 3.0.32. An assertion failure could be triggered with a crafted CGI request leading to server crash.

A flaw was found in Privoxy in versions before 3.0.31. An assertion failure triggered by a crafted CGI request may lead to denial of service. The highest threat from this vulnerability is to system availability.

A flaw was found in Privoxy in versions before 3.0.31. A memory leak that occurs when decompression fails unexpectedly may lead to a denial of service. The highest threat from this vulnerability is to system availability.