gsd-2021-22890
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
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.
Aliases
Aliases
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"GSD": {
"alias": "CVE-2021-22890",
"description": "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.",
"id": "GSD-2021-22890",
"references": [
"https://www.suse.com/security/cve/CVE-2021-22890.html",
"https://www.debian.org/security/2021/dsa-4881",
"https://access.redhat.com/errata/RHSA-2021:2472",
"https://access.redhat.com/errata/RHSA-2021:2471",
"https://ubuntu.com/security/CVE-2021-22890",
"https://advisories.mageia.org/CVE-2021-22890.html",
"https://security.archlinux.org/CVE-2021-22890"
]
},
"gsd": {
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"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
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"id": "GSD-2021-22890",
"modified": "2023-12-13T01:23:24.232324Z",
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"package_slug": "conan/libcurl",
"pubdate": "2021-04-01",
"solution": "Upgrade to version 7.76.0 or above.",
"title": "Authentication Bypass by Spoofing",
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"id": "CVE-2021-22890",
"lastModified": "2024-03-27T15:47:45.160",
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}
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.