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import telnet-0.17-74.el8_3.1

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CentOS Sources 2021-02-16 02:40:53 -05:00 committed by Andrew Lukoshko
parent 4381e14355
commit 6faf140d20
2 changed files with 50 additions and 3 deletions
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42
SOURCES/telnet-0.17-pty-retry.patch Normal file
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@ -0,0 +1,42 @@
--- a/telnetd/telnetd.c
+++ b/telnetd/telnetd.c
@@ -772,7 +772,6 @@ void telnet(int f, int p)
int on = 1;
char *HE;
const char *IM;
- int pty_read_ok = 0; /* track whether the pty read has worked yet */
/*
* Initialize the slc mapping table.
@@ -1086,19 +1085,24 @@ void telnet(int f, int p)
* Something to read from the pty...
*/
if (FD_ISSET(p, &ibits)) {
+ int eio = 0;
+read_pty:
pcc = read(p, ptyibuf, BUFSIZ);
- /*
- * On some systems, if we try to read something
- * off the master side before the slave side is
- * opened, we get EIO.
- */
- if (pcc < 0 && (errno == EWOULDBLOCK || (errno == EIO && pty_read_ok == 0))) {
+ if (pcc < 0 && errno == EWOULDBLOCK) {
pcc = 0;
}
+ /*
+ * If we try to read something off the master side while the slave
+ * side is temporarily closed by login process, we get EIO.
+ */
+ else if (pcc < 0 && errno == EIO && eio < 1000) {
+ eio++;
+ poll(NULL, 0, 10);
+ goto read_pty;
+ }
else {
if (pcc <= 0)
break;
- pty_read_ok = 1; /* mark connection up for read */
#ifdef LINEMODE
/*
* If ioctl from pty, pass it through net

11
SPECS/telnet.spec
View File

@ -3,7 +3,7 @@
Summary: The client program for the Telnet remote login protocol Summary: The client program for the Telnet remote login protocol
Name: telnet Name: telnet
Version: 0.17 Version: 0.17
Release: 73%{?dist}.1 Release: 74%{?dist}.1
Epoch: 1 Epoch: 1
License: BSD License: BSD
Group: Applications/Internet Group: Applications/Internet
@ -42,6 +42,7 @@ Patch30: netkit-telnet-0.17-manpage.patch
Patch31: netkit-telnet-0.17-covscan.patch Patch31: netkit-telnet-0.17-covscan.patch
Patch32: telnet-log-address.patch Patch32: telnet-log-address.patch
Patch33: telnet-0.17-overflow-exploit.patch Patch33: telnet-0.17-overflow-exploit.patch
Patch34: telnet-0.17-pty-retry.patch
BuildRequires: ncurses-devel systemd BuildRequires: ncurses-devel systemd
BuildRequires: perl-interpreter BuildRequires: perl-interpreter
@ -99,6 +100,7 @@ mv telnet telnet-NETKIT
%patch31 -p1 -b .covscan %patch31 -p1 -b .covscan
%patch32 -p1 -b .log-address %patch32 -p1 -b .log-address
%patch33 -p1 -b .overflow %patch33 -p1 -b .overflow
%patch34 -p1 -b .pty-retry
%build %build
%ifarch s390 s390x %ifarch s390 s390x
@ -164,8 +166,11 @@ install -p -m644 %SOURCE6 ${RPM_BUILD_ROOT}%{_unitdir}/telnet.socket
%{_mandir}/man8/telnetd.8* %{_mandir}/man8/telnetd.8*
%changelog %changelog
* Thu Mar 26 2020 Michal Ruprich <michalruprich@gmail.com> - 1:0.17-73.1 * Tue Dec 15 2020 Michal Ruprich <mruprich@redhat.com> - 1:0.17-74.1
- Resolves: #1814473 - Arbitrary remote code execution in utility.c via short writes or urgent data - Resolves: #1907283 - in.telnetd needs to tolerate temporary EIO errors
* Thu Mar 26 2020 Michal Ruprich <michalruprich@gmail.com> - 1:0.17-74
- Resolves: #1814474 - Arbitrary remote code execution in utility.c via short writes or urgent data
* Thu Oct 04 2018 Michal Ruprich <mruprich@redhat.com> - 1:0.17-73 * Thu Oct 04 2018 Michal Ruprich <mruprich@redhat.com> - 1:0.17-73
- Resolves: #1602711 - Please review important issues found by covscan - Resolves: #1602711 - Please review important issues found by covscan