Описание
Security update for curl
This update for curl fixes the following issues:
- CVE-2021-22947: Fixed STARTTLS protocol injection via MITM (bsc#1190374).
- CVE-2021-22946: Fixed protocol downgrade required TLS bypassed (bsc#1190373).
Список пакетов
SUSE Linux Enterprise Server 11-SECURITY
Ссылки
- Link for SUSE-SU-2021:14807-1
- E-Mail link for SUSE-SU-2021:14807-1
- SUSE Security Ratings
- SUSE Bug 1190373
- SUSE Bug 1190374
- SUSE CVE CVE-2021-22946 page
- SUSE CVE CVE-2021-22947 page
Описание
A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.
Затронутые продукты
Ссылки
- CVE-2021-22946
- SUSE Bug 1190373
- SUSE Bug 1194948
Описание
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.
Затронутые продукты
Ссылки
- CVE-2021-22947
- SUSE Bug 1190374