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Details: - Adopt patch from debian, documented in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871810#10 PR: 226088 Submitted by: fk@fabiankeil.de MFH: 2018Q1 Security: CVE-2017-12836
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
From 9c448da8bb5f592ddcd2d980d01d81305f920f78 Mon Sep 17 00:00:00 2001
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From: Fabian Keil <fk@fabiankeil.de>
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Date: Mon, 21 Aug 2017 10:49:05 +0200
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Subject: [PATCH] Add fix for CVE-2017-12836
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Based on a patch by Thorsten Glaser:
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https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871810#10
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The patched file had to be changed and in the first
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chunk the size of rsh_argv has been extended to 16
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to match Debian's upstream version.
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---
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cvs/src/client.c | 12 +++++++++---
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1 file changed, 9 insertions(+), 3 deletions(-)
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diff --git cvs/src/client.c cvs/src/client.c
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index c9fe170..09771ce 100644
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--- src/client.c
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+++ src/client.c
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@@ -4736,9 +4736,10 @@ start_rsh_server (root, to_server, from_server)
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char *cvs_rsh;
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char *cvs_server = getenv ("CVS_SERVER");
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int i = 0;
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- /* This needs to fit "rsh", "-b", "-l", "USER", "host",
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- "cmd (w/ args)", and NULL. We leave some room to grow. */
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- char *rsh_argv[10];
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+ /* This needs to fit "rsh", "-b", "-l", "USER", "-p", port,
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+ "--", "host", "cvs", "-R", "server", and NULL.
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+ We leave some room to grow. */
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+ char *rsh_argv[16];
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if (root->method == extssh_method)
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cvs_rsh = env_cvs_ssh ? env_cvs_ssh : SSH_DFLT;
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@@ -4763,6 +4764,9 @@ start_rsh_server (root, to_server, from_server)
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rsh_argv[i++] = root->username;
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}
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+ /* Only non-option arguments from here. (CVE-2017-12836) */
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+ rsh_argv[i++] = "--";
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+
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rsh_argv[i++] = root->hostname;
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rsh_argv[i++] = cvs_server;
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rsh_argv[i++] = "server";
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@@ -4841,6 +4845,8 @@ start_rsh_server (root, to_server, from_server)
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*p++ = root->username;
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}
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+ *p++ = "--";
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+
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*p++ = root->hostname;
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*p++ = command;
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*p++ = NULL;
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--
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2.14.1
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