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screen: CVE-2023-24626 allows sending SIGHUP to arbitrary PIDs

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Upstream-Status: Backport from https://git.savannah.gnu.org/cgit/screen.git/commit/?id=e9ad41bfedb4537a6f0de20f00b27c7739f168f7

(From OE-Core rev: d1f99b928b0a57bec879dde1b1b94c3c09286ea0)

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Hitendra Prajapati
2023-04-20 12:25:02 +05:30
committed by Steve Sakoman
parent e610a24db7
commit 51a1d78e2a
2 changed files with 41 additions and 0 deletions
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40
meta/recipes-extended/screen/screen/CVE-2023-24626.patch Normal file
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@@ -0,0 +1,40 @@
From e9ad41bfedb4537a6f0de20f00b27c7739f168f7 Mon Sep 17 00:00:00 2001
From: Alexander Naumov <alexander_naumov@opensuse.org>
Date: Mon, 30 Jan 2023 17:22:25 +0200
Subject: fix: missing signal sending permission check on failed query messages
Signed-off-by: Alexander Naumov <alexander_naumov@opensuse.org>
CVE: CVE-2023-24626
Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/screen.git/commit/?id=e9ad41bfedb4537a6f0de20f00b27c7739f168f7]
Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
---
socket.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/socket.c b/socket.c
index bb68b35..9d87445 100644
--- a/socket.c
+++ b/socket.c
@@ -1285,11 +1285,16 @@ ReceiveMsg()
else
queryflag = -1;
- Kill(m.m.command.apid,
+ if (CheckPid(m.m.command.apid)) {
+ Msg(0, "Query attempt with bad pid(%d)!", m.m.command.apid);
+ }
+ else {
+ Kill(m.m.command.apid,
(queryflag >= 0)
? SIGCONT
: SIG_BYE); /* Send SIG_BYE if an error happened */
- queryflag = -1;
+ queryflag = -1;
+ }
}
break;
case MSG_COMMAND:
--
2.25.1

1
meta/recipes-extended/screen/screen_4.8.0.bb
View File

@@ -22,6 +22,7 @@ SRC_URI = "${GNU_MIRROR}/screen/screen-${PV}.tar.gz \
file://0001-fix-for-multijob-build.patch \
file://0001-Remove-more-compatibility-stuff.patch \
file://CVE-2021-26937.patch \
file://CVE-2023-24626.patch \
"
SRC_URI[md5sum] = "d276213d3acd10339cd37848b8c4ab1e"