Insufficient Verification of Data Authenticity Affecting libcurl package, versions <0:7.79.1-1.amzn2.0.1
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Test your applications- Snyk ID SNYK-AMZN2-LIBCURL-2315478
- published 11 Dec 2021
- disclosed 29 Sep 2021
Introduced: 29 Sep 2021
CVE-2021-22947 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 libcurl to version 0:7.79.1-1.amzn2.0.1 or higher.
This issue was patched in ALAS2-2021-1724.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got before the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker's injected data comes from the TLS-protected server.
References
- https://security.netapp.com/advisory/ntap-20211029-0003/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22947
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
- https://hackerone.com/reports/1334763
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html
- http://seclists.org/fulldisclosure/2022/Mar/29
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html
- https://security.gentoo.org/glsa/202212-01
- https://support.apple.com/kb/HT213183
- https://www.debian.org/security/2022/dsa-5197
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/