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50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
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From 29b251362e1839d7094993edbed8f9467069773f Mon Sep 17 00:00:00 2001
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From: Daniel Stenberg <daniel@haxx.se>
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Date: Mon, 25 Sep 2017 00:35:22 +0200
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Subject: [PATCH] FTP: zero terminate the entry path even on bad input
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... a single double quote could leave the entry path buffer without a zero
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terminating byte. CVE-2017-1000254
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Test 1152 added to verify.
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Reported-by: Max Dymond
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Bug: https://curl.haxx.se/docs/adv_20171004.html
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---
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lib/ftp.c | 7 ++++--
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tests/data/Makefile.inc | 1 +
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tests/data/test1152 | 61 +++++++++++++++++++++++++++++++++++++++++++++++++
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3 files changed, 67 insertions(+), 2 deletions(-)
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create mode 100644 tests/data/test1152
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--- a/lib/ftp.c
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+++ b/lib/ftp.c
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@@ -2825,6 +2825,7 @@ static CURLcode ftp_statemach_act(struct
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char *ptr=&data->state.buffer[4]; /* start on the first letter */
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char *dir;
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char *store;
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+ bool entry_extracted = FALSE;
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dir = malloc(nread + 1);
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if(!dir)
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@@ -2856,7 +2857,7 @@ static CURLcode ftp_statemach_act(struct
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}
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else {
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/* end of path */
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- *store = '\0'; /* zero terminate */
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+ entry_extracted = TRUE;
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break; /* get out of this loop */
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}
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}
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@@ -2865,7 +2866,9 @@ static CURLcode ftp_statemach_act(struct
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store++;
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ptr++;
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}
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-
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+ *store = '\0'; /* zero terminate */
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+ }
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+ if(entry_extracted) {
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/* If the path name does not look like an absolute path (i.e.: it
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does not start with a '/'), we probably need some server-dependent
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adjustments. For example, this is the case when connecting to
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