41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
Fixes CVE-2017-5618 (privilege escalation via opening the logfile when
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screen is installed setuid root):
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https://savannah.gnu.org/bugs/?50142
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5618
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This patch reverts the upstream commit that introduced the bug:
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https://git.savannah.gnu.org/cgit/screen.git/commit/?id=5460f5d28c01a9a58e021eb1dffef2965e629d58
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From f55b0cc29a0ac2a1c54e8a5e886b7393edd4a76c Mon Sep 17 00:00:00 2001
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From: Leo Famulari <leo@famulari.name>
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Date: Sat, 11 Feb 2017 22:40:24 -0500
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Subject: [PATCH] Revert "adding permissions check for the logfile name"
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This reverts commit 5460f5d28c01a9a58e021eb1dffef2965e629d58.
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---
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src/screen.c | 6 ------
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1 file changed, 6 deletions(-)
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diff --git a/src/screen.c b/src/screen.c
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index 64650e9..283c305 100644
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--- a/src/screen.c
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+++ b/src/screen.c
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@@ -673,12 +673,6 @@ int main(int ac, char** av)
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Panic(0, "-L: logfile name can not start with \"-\" symbol");
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if (strlen(screenlogfile) > PATH_MAX)
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Panic(0, "-L: logfile name too long. (max. %d char)", PATH_MAX);
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-
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- FILE *w_check;
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- if ((w_check = fopen(screenlogfile, "w")) == NULL)
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- Panic(0, "-L: logfile name access problem");
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- else
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- fclose(w_check);
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}
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nwin_options.Lflag = 1;
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break;
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--
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2.11.1
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