curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.
CVSS Score
3.1
EPSS Score
0.001
Published
2021-06-11
curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources that can lead too overwriting a local file when the -J flag is used.
CVSS Score
7.8
EPSS Score
0.0
Published
2020-12-14
A malicious server can use the FTP PASV response to trick curl 7.73.0 and earlier into connecting back to a given IP address and port, and this way potentially make curl extract information about services that are otherwise private and not disclosed, for example doing port scanning and service banner extractions.
CVSS Score
3.7
EPSS Score
0.001
Published
2020-12-14
Double-free vulnerability in the FTP-kerberos code in cURL 7.52.0 to 7.65.3.
CVSS Score
9.8
EPSS Score
0.036
Published
2019-09-16
Heap buffer overflow in the TFTP protocol handler in cURL 7.19.4 to 7.65.3.
CVSS Score
9.8
EPSS Score
0.097
Published
2019-09-16
A non-privileged user or program can put code and a config file in a known non-privileged path (under C:/usr/local/) that will make curl <= 7.65.1 automatically run the code (as an openssl "engine") on invocation. If that curl is invoked by a privileged user it can do anything it wants.
CVSS Score
7.8
EPSS Score
0.01
Published
2019-07-02
Curl versions 7.14.1 through 7.61.1 are vulnerable to a heap-based buffer over-read in the tool_msgs.c:voutf() function that may result in information exposure and denial of service.
CVSS Score
4.4
EPSS Score
0.002
Published
2018-10-31
Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.
CVSS Score
4.3
EPSS Score
0.003
Published
2018-10-31
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
CVSS Score
4.3
EPSS Score
0.003
Published
2018-10-31
Curl_smtp_escape_eob in lib/smtp.c in curl 7.54.1 to and including curl 7.60.0 has a heap-based buffer overflow that might be exploitable by an attacker who can control the data that curl transmits over SMTP with certain settings (i.e., use of a nonstandard --limit-rate argument or CURLOPT_BUFFERSIZE value).
CVSS Score
9.8
EPSS Score
0.012
Published
2018-07-11