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CVE-2021-22923

curl: Metalink download sends credentials

When curl is instructed to get content using the metalink feature, and a user name and password are used to download the metalink XML file, those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user's expectations and intentions and without telling the user it happened.

CVSS 3.1 · 5.3 Medium EPSS 2.0% KEV · Not listed
Vendors
Fedoraproject Haxx Netapp and 4 more
Products
Fedora Curl Cloud Backup and 22 more
CVE-2021-22922

curl: Content not matching hash in Metalink is not being discarded

When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.

CVSS 3.1 · 6.5 Medium EPSS 4.3% KEV · Not listed
Vendors
Fedoraproject Haxx Netapp and 4 more
Products
Fedora Curl Cloud Backup and 22 more
CVE-2021-22901

curl: Use-after-free in TLS session handling when using OpenSSL TLS backend

curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.

CVSS 3.1 · 8.1 High EPSS 63.5% KEV · Not listed
Vendors
Haxx Netapp Oracle and 3 more
Products
Curl Active Iq Unified Manager Cloud Backup and 32 more
CVE-2021-22897

curl: Cipher settings shared for all connections when using schannel TLS backed

curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.

CVSS 3.1 · 5.3 Medium EPSS 4.3% KEV · Not listed
Vendors
Haxx Netapp Oracle and 2 more
Products
Curl Cloud Backup H300e and 27 more
CVE-2021-22890

curl: TLS 1.3 session ticket mix-up with HTTPS proxy host

curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.

CVSS 3.1 · 4.3 Medium EPSS 3.1% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 6 more
Products
Fabric Operating System Debian Linux Fedora and 9 more
CVE-2021-22876

curl: Leak of authentication credentials in URL via automatic Referer

curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unauthorized Actor" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.

CVSS 3.1 · 5.3 Medium EPSS 5.3% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 6 more
Products
Fabric Operating System Debian Linux Fedora and 12 more
CVE-2021-3737

python: urllib: HTTP client possible infinite loop on a 100 Continue response

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 7.5 High EPSS 13.2% KEV · Not listed
Vendors
Canonical Fedoraproject Netapp and 3 more
Products
Ubuntu Linux Fedora Hci and 15 more
CVE-2021-3733

python: urllib: Regular expression DoS in AbstractBasicAuthHandler

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

CVSS 3.1 · 6.5 Medium EPSS 4.8% KEV · Not listed
Vendors
Fedoraproject Netapp Python and 1 more
Products
Extra Packages For Enterprise Linux Fedora Hci Compute Node Firmware and 18 more
CVE-2021-3537

libxml2: NULL pointer dereference when post-validating mixed content parsed in recovery mode

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 5.9 Medium EPSS 3.6% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 18 more
CVE-2021-3518

libxml2: Use-after-free in xmlXIncludeDoProcess() in xinclude.c

There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.

CVSS 3.1 · 8.8 High EPSS 21.9% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 17 more
CVE-2021-3517

libxml2: Heap-based buffer overflow in xmlEncodeEntitiesInternal() in entities.c

There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.

CVSS 3.1 · 8.6 High EPSS 17.0% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 27 more
CVE-2020-26116

python: CRLF injection via HTTP request method in httplib/http.client

http.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9, and 3.8.x before 3.8.5 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request.

CVSS 3.1 · 7.2 High EPSS 6.4% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 5 more
Products
Ubuntu Linux Debian Linux Fedora and 9 more
CVE-2020-24977

libxml2: Buffer overflow vulnerability in xmlEncodeEntitiesInternal() in entities.c

GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at libxml2/entities.c. The issue has been fixed in commit 50f06b3e.

CVSS 3.1 · 6.5 Medium EPSS 3.0% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 4 more
Products
Debian Linux Fedora Active Iq Unified Manager and 17 more
CVE-2020-15778

openssh: scp allows command injection when using backtick characters in the destination argument

scp in OpenSSH through 8.3p1 allows command injection in the scp.c toremote function, as demonstrated by backtick characters in the destination argument. NOTE: the vendor reportedly has stated that they intentionally omit validation of "anomalous argument transfers" because that could "stand a great chance of breaking existing workflows."

CVSS 3.1 · 7.8 High EPSS 13.7% KEV · Not listed
Vendors
Broadcom Netapp Openbsd and 1 more
Products
Fabric Operating System A700s A700s Firmware and 8 more
CVE-2020-14145

openssh: Observable discrepancy leading to an information leak in the algorithm negotiation

The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected.

CVSS 3.1 · 5.9 Medium EPSS 2.9% KEV · Not listed
Vendors
Netapp Openbsd Redhat
Products
Active Iq Unified Manager Aff A700s Aff A700s Firmware and 8 more
CVE-2020-13631

sqlite: Virtual table can be renamed into the name of one of its shadow tables

SQLite before 3.32.0 allows a virtual table to be renamed to the name of one of its shadow tables, related to alter.c and build.c.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apple Broadcom Canonical and 6 more
Products
Icloud Ipados Iphone Os and 17 more
CVE-2020-13630

sqlite: Use-after-free in fts3EvalNextRow in ext/fts3/fts3.c

ext/fts3/fts3.c in SQLite before 3.32.0 has a use-after-free in fts3EvalNextRow, related to the snippet feature.

CVSS 3.1 · 7.0 High EPSS 1.0% KEV · Not listed
Vendors
Apple Broadcom Canonical and 7 more
Products
Icloud Ipados Iphone Os and 18 more
CVE-2020-8286

curl: Inferior OCSP verification

curl 7.41.0 through 7.73.0 is vulnerable to an improper check for certificate revocation due to insufficient verification of the OCSP response.

CVSS 3.1 · 7.5 High EPSS 4.6% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 6 more
Products
Mac Os X Macos Debian Linux and 19 more
CVE-2020-8285

curl: Malicious FTP server can trigger stack overflow when CURLOPT_CHUNK_BGN_FUNCTION is used

curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue in FTP wildcard match parsing.

CVSS 3.1 · 7.5 High EPSS 9.8% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 7 more
Products
Mac Os X Macos Debian Linux and 29 more