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| author |   Khem Raj <raj.khem@gmail.com> | 2022-09-12 18:37:45 -0700 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2022-09-13 23:03:34 +0100 |
| commit | f9c23404de44553eacd363885588b88714742387 (patch) | |
| tree | b796149596d76c1165ef81570c48bf28b4252d51 /meta/recipes-connectivity | |
| parent | 5789c34b3e77937d034817a0cbd73bc1e4dcf451 (diff) | |
| download | openembedded-core-f9c23404de44553eacd363885588b88714742387.tar.gz | |
inetutils: Fix remote DoS vulnerability in inetutils-telnetd
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-connectivity')
| -rw-r--r-- | meta/recipes-connectivity/inetutils/inetutils/CVE-2022-39028.patch | 54 | ||||
| -rw-r--r-- | meta/recipes-connectivity/inetutils/inetutils_2.3.bb | 1 |
2 files changed, 55 insertions, 0 deletions
diff --git a/meta/recipes-connectivity/inetutils/inetutils/CVE-2022-39028.patch b/meta/recipes-connectivity/inetutils/inetutils/CVE-2022-39028.patch new file mode 100644 index 0000000000..3b07515c7b --- /dev/null +++ b/meta/recipes-connectivity/inetutils/inetutils/CVE-2022-39028.patch @@ -0,0 +1,54 @@ +From d52349fa1b6baac77ffa2c74769636aa2ece2ec5 Mon Sep 17 00:00:00 2001 +From: Erik Auerswald <auerswal@unix-ag.uni-kl.de> +Date: Sat, 3 Sep 2022 16:58:16 +0200 +Subject: [PATCH] telnetd: Handle early IAC EC or IAC EL receipt + +Fix telnetd crash if the first two bytes of a new connection +are 0xff 0xf7 (IAC EC) or 0xff 0xf8 (IAC EL). + +The problem was reported in: +<https://pierrekim.github.io/blog/2022-08-24-2-byte-dos-freebsd-netbsd-telnetd-netkit-telnetd-inetutils-telnetd-kerberos-telnetd.html>. + +* NEWS: Mention fix. +* telnetd/state.c (telrcv): Handle zero slctab[SLC_EC].sptr and +zero slctab[SLC_EL].sptr. + +CVE: CVE-2022-39028 +Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=fae8263e467380483c28513c0e5fac143e46f94f] +Signed-off-by: Khem Raj <raj.khem@gmail.com> +--- + telnetd/state.c | 12 +++++++++--- + 1 file changed, 9 insertions(+), 3 deletions(-) + +diff --git a/telnetd/state.c b/telnetd/state.c +index ffc6cba..c2d760f 100644 +--- a/telnetd/state.c ++++ b/telnetd/state.c +@@ -312,15 +312,21 @@ telrcv (void) + case EC: + case EL: + { +- cc_t ch; ++ cc_t ch = (cc_t) (_POSIX_VDISABLE); + + DEBUG (debug_options, 1, printoption ("td: recv IAC", c)); + ptyflush (); /* half-hearted */ + init_termbuf (); + if (c == EC) +- ch = *slctab[SLC_EC].sptr; ++ { ++ if (slctab[SLC_EC].sptr) ++ ch = *slctab[SLC_EC].sptr; ++ } + else +- ch = *slctab[SLC_EL].sptr; ++ { ++ if (slctab[SLC_EL].sptr) ++ ch = *slctab[SLC_EL].sptr; ++ } + if (ch != (cc_t) (_POSIX_VDISABLE)) + pty_output_byte ((unsigned char) ch); + break; +-- +2.37.3 + diff --git a/meta/recipes-connectivity/inetutils/inetutils_2.3.bb b/meta/recipes-connectivity/inetutils/inetutils_2.3.bb index 1e8f63637e..2fce84374d 100644 --- a/meta/recipes-connectivity/inetutils/inetutils_2.3.bb +++ b/meta/recipes-connectivity/inetutils/inetutils_2.3.bb @@ -21,6 +21,7 @@ SRC_URI = "${GNU_MIRROR}/inetutils/inetutils-${PV}.tar.xz \ file://tftpd.xinetd.inetutils \ file://inetutils-1.9-PATH_PROCNET_DEV.patch \ file://inetutils-only-check-pam_appl.h-when-pam-enabled.patch \ + file://CVE-2022-39028.patch \ " inherit autotools gettext update-alternatives texinfo |