Vulnerability · NVD
CVE-2021-22947
CVE-2021-22947 : medium severity (CVSS 5.9). No tracked catalog app is linked to this CVE.
- Severity (CVSS)
- 5.9
- Exploitation
- 3.0 %
- Tracked apps
- 0
- Still exposed
- 0
NVD scale
EPSS, predicted over 30 days
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.
Show raw CVSS vector
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Server 2022 Fixed in 10.0.20348.469
- Windows Server 2019 Fixed in 10.0.17763.2452
- Windows 11 21H2 · 2021-H2 Fixed in 10.0.22000.434
- Windows 10 21H2 · 2021-H2 Fixed in 10.0.19044.1466
- Windows 10 21H1 · 2021-H1 Fixed in 10.0.19043.1466
- Windows 10 20H2 · 2020-H2 Fixed in 10.0.19042.1466
- Windows 10 1909 · 2019-09 Fixed in 10.0.18363.2037
- Windows 10 1809 · 2018-09 Fixed in 10.0.17763.2452
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