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* bug#47563: curl is vulnerable to CVE-2021-22890 and CVE-2021-22876
@ 2021-04-02 14:04 Léo Le Bouter via Bug reports for GNU Guix
  2021-04-02 14:09 ` bug#47563: [PATCH 0/1] gnu: curl: Fix CVE-2021-22876 and CVE-2021-22890 Léo Le Bouter via Bug reports for GNU Guix
                   ` (2 more replies)
  0 siblings, 3 replies; 10+ messages in thread
From: Léo Le Bouter via Bug reports for GNU Guix @ 2021-04-02 14:04 UTC (permalink / raw)
  To: 47563

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CVE-2021-22890	01.04.21 20:15
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.

CVE-2021-22876	01.04.21 20:15
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.

A WIP patch will follow, please help finishing it (rebase curl-CVE-
2021-22890.patch on 7.74.0).

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^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2021-04-02 20:47 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-02 14:04 bug#47563: curl is vulnerable to CVE-2021-22890 and CVE-2021-22876 Léo Le Bouter via Bug reports for GNU Guix
2021-04-02 14:09 ` bug#47563: [PATCH 0/1] gnu: curl: Fix CVE-2021-22876 and CVE-2021-22890 Léo Le Bouter via Bug reports for GNU Guix
2021-04-02 14:09   ` bug#47563: [PATCH 1/1] " Léo Le Bouter via Bug reports for GNU Guix
2021-04-02 18:22   ` bug#47563: [PATCH 0/1] " Leo Famulari
2021-04-02 18:43     ` Léo Le Bouter via Bug reports for GNU Guix
2021-04-02 19:24 ` bug#47563: [PATCH] gnu: curl: Update to 7.76.0 [security fixes] Léo Le Bouter via Bug reports for GNU Guix
2021-04-02 19:33 ` bug#47563: [PATCH v2] " Léo Le Bouter via Bug reports for GNU Guix
2021-04-02 19:34   ` Léo Le Bouter via Bug reports for GNU Guix
2021-04-02 20:36     ` Leo Famulari
2021-04-02 20:46   ` Leo Famulari

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