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Authentication Bypass The advisory has been revoked - it doesn't affect any version of package curl  (opens in a new tab)

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EPSS
3.06% (88th percentile)

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  • Snyk IDSNYK-DEBIAN9-CURL-1089956
  • published31 Mar 2021
  • disclosed1 Apr 2021
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Introduced: 31 Mar 2021

CVE-2021-22890  (opens in a new tab)
CWE-290  (opens in a new tab)

Amendment

The Debian security team deemed this advisory irrelevant for Debian:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Debian.

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.

References