Security update for curl SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2021:3298-1 Final 1 1 2021-10-06T14:55:13Z current 2021-10-06T14:55:13Z 2021-10-06T14:55:13Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z 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). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). openSUSE-SLE-15.3-2021-3298 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ROJISG4GC22MLBYTQB5THWN4V2IFZC7P/ E-Mail link for openSUSE-SU-2021:3298-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1190373 SUSE Bug 1190373 https://bugzilla.suse.com/1190374 SUSE Bug 1190374 https://www.suse.com/security/cve/CVE-2021-22946/ SUSE CVE CVE-2021-22946 page https://www.suse.com/security/cve/CVE-2021-22947/ SUSE CVE CVE-2021-22947 page openSUSE Leap 15.3 curl-7.66.0-4.27.1 libcurl-devel-7.66.0-4.27.1 libcurl-devel-32bit-7.66.0-4.27.1 libcurl4-7.66.0-4.27.1 libcurl4-32bit-7.66.0-4.27.1 curl-7.66.0-4.27.1 as a component of openSUSE Leap 15.3 libcurl-devel-7.66.0-4.27.1 as a component of openSUSE Leap 15.3 libcurl-devel-32bit-7.66.0-4.27.1 as a component of openSUSE Leap 15.3 libcurl4-7.66.0-4.27.1 as a component of openSUSE Leap 15.3 libcurl4-32bit-7.66.0-4.27.1 as a component of openSUSE Leap 15.3 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. CVE-2021-22946 openSUSE Leap 15.3:curl-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl-devel-32bit-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl-devel-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl4-32bit-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl4-7.66.0-4.27.1 moderate 5 AV:N/AC:L/Au:N/C:P/I:N/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ROJISG4GC22MLBYTQB5THWN4V2IFZC7P/ https://www.suse.com/security/cve/CVE-2021-22946.html CVE-2021-22946 https://bugzilla.suse.com/1190373 SUSE Bug 1190373 https://bugzilla.suse.com/1194948 SUSE Bug 1194948 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. CVE-2021-22947 openSUSE Leap 15.3:curl-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl-devel-32bit-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl-devel-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl4-32bit-7.66.0-4.27.1 openSUSE Leap 15.3:libcurl4-7.66.0-4.27.1 moderate 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ROJISG4GC22MLBYTQB5THWN4V2IFZC7P/ https://www.suse.com/security/cve/CVE-2021-22947.html CVE-2021-22947 https://bugzilla.suse.com/1190374 SUSE Bug 1190374