packages/curl
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

fix CVE-2021-22945 CVE-2021-22946 CVE-2021-22947

Browse Source
This commit is contained in:
yangl777 2021-09-29 11:23:20 +08:00
parent 69b6e910fc
commit 8d50362ed6
4 changed files with 710 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
backport-CVE-2021-22945.patch Normal file
View File

@ -0,0 +1,27 @@
From 43157490a5054bd24256fe12876931e8abc9df49 Mon Sep 17 00:00:00 2001
From: z2_ on hackerone <>
Date: Tue, 24 Aug 2021 09:50:33 +0200
Subject: [PATCH] mqtt: clear the leftovers pointer when sending succeeds
CVE-2021-22945
Bug: https://curl.se/docs/CVE-2021-22945.html
---
lib/mqtt.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/mqtt.c b/lib/mqtt.c
index f077e6c3dc44..fcd40b41e600 100644
--- a/lib/mqtt.c
+++ b/lib/mqtt.c
@@ -128,6 +128,10 @@ static CURLcode mqtt_send(struct Curl_easy *data,
mq->sendleftovers = sendleftovers;
mq->nsend = nsend;
}
+ else {
+ mq->sendleftovers = NULL;
+ mq->nsend = 0;
+ }
return result;
}

325
backport-CVE-2021-22946.patch Normal file
View File

@ -0,0 +1,325 @@
From 364f174724ef115c63d5e5dc1d3342c8a43b1cca Mon Sep 17 00:00:00 2001
From: Patrick Monnerat <patrick@monnerat.net>
Date: Wed, 8 Sep 2021 11:56:22 +0200
Subject: [PATCH] ftp,imap,pop3: do not ignore --ssl-reqd
In imap and pop3, check if TLS is required even when capabilities
request has failed.
In ftp, ignore preauthentication (230 status of server greeting) if TLS
is required.
Bug: https://curl.se/docs/CVE-2021-22946.html
CVE-2021-22946
---
lib/ftp.c | 9 ++++---
lib/imap.c | 24 ++++++++----------
lib/pop3.c | 33 +++++++++++-------------
tests/data/Makefile.inc | 2 ++
tests/data/test984 | 56 +++++++++++++++++++++++++++++++++++++++++
tests/data/test985 | 54 +++++++++++++++++++++++++++++++++++++++
tests/data/test986 | 53 ++++++++++++++++++++++++++++++++++++++
7 files changed, 195 insertions(+), 36 deletions(-)
create mode 100644 tests/data/test984
create mode 100644 tests/data/test985
create mode 100644 tests/data/test986
diff --git a/lib/ftp.c b/lib/ftp.c
index 1a699de59459..08d18ca7442b 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -2681,9 +2681,12 @@ static CURLcode ftp_statemachine(struct Curl_easy *data,
/* we have now received a full FTP server response */
switch(ftpc->state) {
case FTP_WAIT220:
- if(ftpcode == 230)
- /* 230 User logged in - already! */
- return ftp_state_user_resp(data, ftpcode, ftpc->state);
+ if(ftpcode == 230) {
+ /* 230 User logged in - already! Take as 220 if TLS required. */
+ if(data->set.use_ssl <= CURLUSESSL_TRY ||
+ conn->bits.ftp_use_control_ssl)
+ return ftp_state_user_resp(data, ftpcode, ftpc->state);
+ }
else if(ftpcode != 220) {
failf(data, "Got a %03d ftp-server response when 220 was expected",
ftpcode);
diff --git a/lib/imap.c b/lib/imap.c
index 359fc692e56d..923b1d59bd1c 100644
--- a/lib/imap.c
+++ b/lib/imap.c
@@ -934,22 +934,18 @@ static CURLcode imap_state_capability_resp(struct Curl_easy *data,
line += wordlen;
}
}
- else if(imapcode == IMAP_RESP_OK) {
- if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
- /* We don't have a SSL/TLS connection yet, but SSL is requested */
- if(imapc->tls_supported)
- /* Switch to TLS connection now */
- result = imap_perform_starttls(data, conn);
- else if(data->set.use_ssl == CURLUSESSL_TRY)
- /* Fallback and carry on with authentication */
- result = imap_perform_authentication(data, conn);
- else {
- failf(data, "STARTTLS not supported.");
- result = CURLE_USE_SSL_FAILED;
- }
+ else if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
+ /* PREAUTH is not compatible with STARTTLS. */
+ if(imapcode == IMAP_RESP_OK && imapc->tls_supported && !imapc->preauth) {
+ /* Switch to TLS connection now */
+ result = imap_perform_starttls(data, conn);
}
- else
+ else if(data->set.use_ssl <= CURLUSESSL_TRY)
result = imap_perform_authentication(data, conn);
+ else {
+ failf(data, "STARTTLS not available.");
+ result = CURLE_USE_SSL_FAILED;
+ }
}
else
result = imap_perform_authentication(data, conn);
diff --git a/lib/pop3.c b/lib/pop3.c
index d7b5283e1ed1..a331d71f7770 100644
--- a/lib/pop3.c
+++ b/lib/pop3.c
@@ -740,28 +740,23 @@ static CURLcode pop3_state_capa_resp(struct Curl_easy *data, int pop3code,
}
}
}
- else if(pop3code == '+') {
- if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
- /* We don't have a SSL/TLS connection yet, but SSL is requested */
- if(pop3c->tls_supported)
- /* Switch to TLS connection now */
- result = pop3_perform_starttls(data, conn);
- else if(data->set.use_ssl == CURLUSESSL_TRY)
- /* Fallback and carry on with authentication */
- result = pop3_perform_authentication(data, conn);
- else {
- failf(data, "STLS not supported.");
- result = CURLE_USE_SSL_FAILED;
- }
- }
- else
- result = pop3_perform_authentication(data, conn);
- }
else {
/* Clear text is supported when CAPA isn't recognised */
- pop3c->authtypes |= POP3_TYPE_CLEARTEXT;
+ if(pop3code != '+')
+ pop3c->authtypes |= POP3_TYPE_CLEARTEXT;
- result = pop3_perform_authentication(data, conn);
+ if(!data->set.use_ssl || conn->ssl[FIRSTSOCKET].use)
+ result = pop3_perform_authentication(data, conn);
+ else if(pop3code == '+' && pop3c->tls_supported)
+ /* Switch to TLS connection now */
+ result = pop3_perform_starttls(data, conn);
+ else if(data->set.use_ssl <= CURLUSESSL_TRY)
+ /* Fallback and carry on with authentication */
+ result = pop3_perform_authentication(data, conn);
+ else {
+ failf(data, "STLS not supported.");
+ result = CURLE_USE_SSL_FAILED;
+ }
}
return result;
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 59e1145fc800..8e05ee907401 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -118,6 +118,8 @@ test954 test955 test956 test957 test958 test959 test960 test961 test962 \
test963 test964 test965 test966 test967 test968 test969 test970 test971 \
test972 \
\
+test984 test985 test986 \
+\
test1000 test1001 test1002 test1003 test1004 test1005 test1006 test1007 \
test1008 test1009 test1010 test1011 test1012 test1013 test1014 test1015 \
test1016 test1017 test1018 test1019 test1020 test1021 test1022 test1023 \
diff --git a/tests/data/test984 b/tests/data/test984
new file mode 100644
index 000000000000..e573f23c15b4
--- /dev/null
+++ b/tests/data/test984
@@ -0,0 +1,56 @@
+<testcase>
+<info>
+<keywords>
+IMAP
+STARTTLS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+REPLY CAPABILITY A001 BAD Not implemented
+</servercmd>
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+SSL
+</features>
+<server>
+imap
+</server>
+ <name>
+IMAP require STARTTLS with failing capabilities
+ </name>
+ <command>
+imap://%HOSTIP:%IMAPPORT/%TESTNUMBER -T log/upload%TESTNUMBER -u user:secret --ssl-reqd
+</command>
+<file name="log/upload%TESTNUMBER">
+Date: Mon, 7 Feb 1994 21:52:25 -0800 (PST)
+From: Fred Foobar <foobar@example.COM>
+Subject: afternoon meeting
+To: joe@example.com
+Message-Id: <B27397-0100000@example.COM>
+MIME-Version: 1.0
+Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
+
+Hello Joe, do you think we can meet at 3:30 tomorrow?
+</file>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+# 64 is CURLE_USE_SSL_FAILED
+<errorcode>
+64
+</errorcode>
+<protocol>
+A001 CAPABILITY
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test985 b/tests/data/test985
new file mode 100644
index 000000000000..d0db4aadf5db
--- /dev/null
+++ b/tests/data/test985
@@ -0,0 +1,54 @@
+<testcase>
+<info>
+<keywords>
+POP3
+STARTTLS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+REPLY CAPA -ERR Not implemented
+</servercmd>
+<data nocheck="yes">
+From: me@somewhere
+To: fake@nowhere
+
+body
+
+--
+ yours sincerely
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+SSL
+</features>
+<server>
+pop3
+</server>
+ <name>
+POP3 require STARTTLS with failing capabilities
+ </name>
+ <command>
+pop3://%HOSTIP:%POP3PORT/%TESTNUMBER -u user:secret --ssl-reqd
+ </command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+# 64 is CURLE_USE_SSL_FAILED
+<errorcode>
+64
+</errorcode>
+<protocol>
+CAPA
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test986 b/tests/data/test986
new file mode 100644
index 000000000000..a709437a49ff
--- /dev/null
+++ b/tests/data/test986
@@ -0,0 +1,53 @@
+<testcase>
+<info>
+<keywords>
+FTP
+STARTTLS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+REPLY welcome 230 Welcome
+REPLY AUTH 500 unknown command
+</servercmd>
+</reply>
+
+# Client-side
+<client>
+<features>
+SSL
+</features>
+<server>
+ftp
+</server>
+ <name>
+FTP require STARTTLS while preauthenticated
+ </name>
+<file name="log/test%TESTNUMBER.txt">
+data
+ to
+ see
+that FTPS
+works
+ so does it?
+</file>
+ <command>
+--ssl-reqd --ftp-ssl-control ftp://%HOSTIP:%FTPPORT/%TESTNUMBER -T log/test%TESTNUMBER.txt -u user:secret
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+# 64 is CURLE_USE_SSL_FAILED
+<errorcode>
+64
+</errorcode>
+<protocol>
+AUTH SSL
+AUTH TLS
+</protocol>
+</verify>
+</testcase>

348
backport-CVE-2021-22947.patch Normal file
View File

@ -0,0 +1,348 @@
From 8ef147c43646e91fdaad5d0e7b60351f842e5c68 Mon Sep 17 00:00:00 2001
From: Patrick Monnerat <patrick@monnerat.net>
Date: Tue, 7 Sep 2021 13:26:42 +0200
Subject: [PATCH] ftp,imap,pop3,smtp: reject STARTTLS server response
pipelining
If a server pipelines future responses within the STARTTLS response, the
former are preserved in the pingpong cache across TLS negotiation and
used as responses to the encrypted commands.
This fix detects pipelined STARTTLS responses and rejects them with an
error.
CVE-2021-22947
Bug: https://curl.se/docs/CVE-2021-22947.html
---
lib/ftp.c | 3 +++
lib/imap.c | 4 +++
lib/pop3.c | 4 +++
lib/smtp.c | 4 +++
tests/data/Makefile.inc | 2 +-
tests/data/test980 | 52 ++++++++++++++++++++++++++++++++++++
tests/data/test981 | 59 +++++++++++++++++++++++++++++++++++++++++
tests/data/test982 | 57 +++++++++++++++++++++++++++++++++++++++
tests/data/test983 | 52 ++++++++++++++++++++++++++++++++++++
9 files changed, 236 insertions(+), 1 deletion(-)
create mode 100644 tests/data/test980
create mode 100644 tests/data/test981
create mode 100644 tests/data/test982
create mode 100644 tests/data/test983
diff --git a/lib/ftp.c b/lib/ftp.c
index 08d18ca7442b..0b9c9b7322b5 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -2743,6 +2743,9 @@ static CURLcode ftp_statemachine(struct Curl_easy *data,
case FTP_AUTH:
/* we have gotten the response to a previous AUTH command */
+ if(pp->cache_size)
+ return CURLE_WEIRD_SERVER_REPLY; /* Forbid pipelining in response. */
+
/* RFC2228 (page 5) says:
*
* If the server is willing to accept the named security mechanism,
diff --git a/lib/imap.c b/lib/imap.c
index 923b1d59bd1c..6163899bbeb6 100644
--- a/lib/imap.c
+++ b/lib/imap.c
@@ -963,6 +963,10 @@ static CURLcode imap_state_starttls_resp(struct Curl_easy *data,
(void)instate; /* no use for this yet */
+ /* Pipelining in response is forbidden. */
+ if(data->conn->proto.imapc.pp.cache_size)
+ return CURLE_WEIRD_SERVER_REPLY;
+
if(imapcode != IMAP_RESP_OK) {
if(data->set.use_ssl != CURLUSESSL_TRY) {
failf(data, "STARTTLS denied");
diff --git a/lib/pop3.c b/lib/pop3.c
index a331d71f7770..d3f3de6d49a9 100644
--- a/lib/pop3.c
+++ b/lib/pop3.c
@@ -771,6 +771,10 @@ static CURLcode pop3_state_starttls_resp(struct Curl_easy *data,
CURLcode result = CURLE_OK;
(void)instate; /* no use for this yet */
+ /* Pipelining in response is forbidden. */
+ if(data->conn->proto.pop3c.pp.cache_size)
+ return CURLE_WEIRD_SERVER_REPLY;
+
if(pop3code != '+') {
if(data->set.use_ssl != CURLUSESSL_TRY) {
failf(data, "STARTTLS denied");
diff --git a/lib/smtp.c b/lib/smtp.c
index 20dc85a5f23b..02ddaca0a279 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -834,6 +834,10 @@ static CURLcode smtp_state_starttls_resp(struct Curl_easy *data,
CURLcode result = CURLE_OK;
(void)instate; /* no use for this yet */
+ /* Pipelining in response is forbidden. */
+ if(data->conn->proto.smtpc.pp.cache_size)
+ return CURLE_WEIRD_SERVER_REPLY;
+
if(smtpcode != 220) {
if(data->set.use_ssl != CURLUSESSL_TRY) {
failf(data, "STARTTLS denied, code %d", smtpcode);
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 8e05ee907401..787c3637510a 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -118,7 +118,7 @@ test954 test955 test956 test957 test958 test959 test960 test961 test962 \
test963 test964 test965 test966 test967 test968 test969 test970 test971 \
test972 \
\
-test984 test985 test986 \
+test980 test981 test982 test983 test984 test985 test986 \
\
test1000 test1001 test1002 test1003 test1004 test1005 test1006 test1007 \
test1008 test1009 test1010 test1011 test1012 test1013 test1014 test1015 \
diff --git a/tests/data/test980 b/tests/data/test980
new file mode 100644
index 000000000000..97567f85638a
--- /dev/null
+++ b/tests/data/test980
@@ -0,0 +1,52 @@
+<testcase>
+<info>
+<keywords>
+SMTP
+STARTTLS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+CAPA STARTTLS
+AUTH PLAIN
+REPLY STARTTLS 454 currently unavailable\r\n235 Authenticated\r\n250 2.1.0 Sender ok\r\n250 2.1.5 Recipient ok\r\n354 Enter mail\r\n250 2.0.0 Accepted
+REPLY AUTH 535 5.7.8 Authentication credentials invalid
+</servercmd>
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+SSL
+</features>
+<server>
+smtp
+</server>
+ <name>
+SMTP STARTTLS pipelined server response
+ </name>
+<stdin>
+mail body
+</stdin>
+ <command>
+smtp://%HOSTIP:%SMTPPORT/%TESTNUMBER --mail-rcpt recipient@example.com --mail-from sender@example.com -u user:secret --ssl --sasl-ir -T -
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+# 8 is CURLE_WEIRD_SERVER_REPLY
+<errorcode>
+8
+</errorcode>
+<protocol>
+EHLO %TESTNUMBER
+STARTTLS
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test981 b/tests/data/test981
new file mode 100644
index 000000000000..2b98ce42ad4c
--- /dev/null
+++ b/tests/data/test981
@@ -0,0 +1,59 @@
+<testcase>
+<info>
+<keywords>
+IMAP
+STARTTLS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+CAPA STARTTLS
+REPLY STARTTLS A002 BAD currently unavailable\r\nA003 OK Authenticated\r\nA004 OK Accepted
+REPLY LOGIN A003 BAD Authentication credentials invalid
+</servercmd>
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+SSL
+</features>
+<server>
+imap
+</server>
+ <name>
+IMAP STARTTLS pipelined server response
+ </name>
+ <command>
+imap://%HOSTIP:%IMAPPORT/%TESTNUMBER -T log/upload%TESTNUMBER -u user:secret --ssl
+</command>
+<file name="log/upload%TESTNUMBER">
+Date: Mon, 7 Feb 1994 21:52:25 -0800 (PST)
+From: Fred Foobar <foobar@example.COM>
+Subject: afternoon meeting
+To: joe@example.com
+Message-Id: <B27397-0100000@example.COM>
+MIME-Version: 1.0
+Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
+
+Hello Joe, do you think we can meet at 3:30 tomorrow?
+</file>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+# 8 is CURLE_WEIRD_SERVER_REPLY
+<errorcode>
+8
+</errorcode>
+<protocol>
+A001 CAPABILITY
+A002 STARTTLS
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test982 b/tests/data/test982
new file mode 100644
index 000000000000..9e07cc0b3f1f
--- /dev/null
+++ b/tests/data/test982
@@ -0,0 +1,57 @@
+<testcase>
+<info>
+<keywords>
+POP3
+STARTTLS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+CAPA STLS USER
+REPLY STLS -ERR currently unavailable\r\n+OK user accepted\r\n+OK authenticated
+REPLY PASS -ERR Authentication credentials invalid
+</servercmd>
+<data nocheck="yes">
+From: me@somewhere
+To: fake@nowhere
+
+body
+
+--
+ yours sincerely
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+SSL
+</features>
+<server>
+pop3
+</server>
+ <name>
+POP3 STARTTLS pipelined server response
+ </name>
+ <command>
+pop3://%HOSTIP:%POP3PORT/%TESTNUMBER -u user:secret --ssl
+ </command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+# 8 is CURLE_WEIRD_SERVER_REPLY
+<errorcode>
+8
+</errorcode>
+<protocol>
+CAPA
+STLS
+</protocol>
+</verify>
+</testcase>
diff --git a/tests/data/test983 b/tests/data/test983
new file mode 100644
index 000000000000..300ec459c99b
--- /dev/null
+++ b/tests/data/test983
@@ -0,0 +1,52 @@
+<testcase>
+<info>
+<keywords>
+FTP
+STARTTLS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+REPLY AUTH 500 unknown command\r\n500 unknown command\r\n331 give password\r\n230 Authenticated\r\n257 "/"\r\n200 OK\r\n200 OK\r\n200 OK\r\n226 Transfer complete
+REPLY PASS 530 Login incorrect
+</servercmd>
+</reply>
+
+# Client-side
+<client>
+<features>
+SSL
+</features>
+<server>
+ftp
+</server>
+ <name>
+FTP STARTTLS pipelined server response
+ </name>
+<file name="log/test%TESTNUMBER.txt">
+data
+ to
+ see
+that FTPS
+works
+ so does it?
+</file>
+ <command>
+--ssl --ftp-ssl-control ftp://%HOSTIP:%FTPPORT/%TESTNUMBER -T log/test%TESTNUMBER.txt -u user:secret -P %CLIENTIP
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+# 8 is CURLE_WEIRD_SERVER_REPLY
+<errorcode>
+8
+</errorcode>
+<protocol>
+AUTH SSL
+</protocol>
+</verify>
+</testcase>

11
curl.spec
View File

@ -6,7 +6,7 @@
Name: curl Name: curl
Version: 7.77.0 Version: 7.77.0
Release: 2 Release: 3
Summary: Curl is used in command lines or scripts to transfer data Summary: Curl is used in command lines or scripts to transfer data
License: MIT License: MIT
URL: https://curl.haxx.se/ URL: https://curl.haxx.se/
@ -18,6 +18,9 @@ Patch105: 0105-curl-7.63.0-lib1560-valgrind.patch
Patch106: 0106-curl-fix-CVE-2019-15601.patch Patch106: 0106-curl-fix-CVE-2019-15601.patch
Patch107: backport-CVE-2021-22925.patch Patch107: backport-CVE-2021-22925.patch
Patch108: backport-CVE-2021-22926.patch Patch108: backport-CVE-2021-22926.patch
Patch109: backport-CVE-2021-22945.patch
Patch110: backport-CVE-2021-22946.patch
Patch111: backport-CVE-2021-22947.patch
BuildRequires: automake brotli-devel coreutils gcc groff krb5-devel BuildRequires: automake brotli-devel coreutils gcc groff krb5-devel
BuildRequires: libidn2-devel libmetalink-devel libnghttp2-devel libpsl-devel BuildRequires: libidn2-devel libmetalink-devel libnghttp2-devel libpsl-devel
@ -167,6 +170,12 @@ rm -rf ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la
%{_mandir}/man3/* %{_mandir}/man3/*
%changelog %changelog
* Wed Sep 29 2021 yanglu <yanglu72@huawei.com> - 7.77.0-3
- Type:CVE
- CVE:CVE-2021-22945 CVE-2021-22946 CVE-2021-22947
- SUG:NA
- DESC:fix CVE-2021-22945 CVE-2021-22946CVE-2021-22947
* Fri Aug 13 2021 gaihuiying <gaihuiying1@huawei.com> - 7.77.0-2 * Fri Aug 13 2021 gaihuiying <gaihuiying1@huawei.com> - 7.77.0-2
- Type:CVE - Type:CVE
- CVE:CVE-2021-22925 CVE-2021-22926 - CVE:CVE-2021-22925 CVE-2021-22926