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| author | Daniel Stenberg <daniel@haxx.se> | 2017-11-10 08:52:45 +0100 |
|---|---|---|
| committer | Daniel Stenberg <daniel@haxx.se> | 2017-11-27 08:19:34 +0100 |
| commit | 0b664ba968437715819bfe4c7ada5679d16ebbc3 (patch) | |
| tree | dc93d3b1c104f43a54b703bb69a71621c658cff8 /lib/curl_fnmatch.c | |
| parent | 9b5e12a5491d2e6b68e0c88ca56f3a9ef9fba400 (diff) | |
| download | curl-0b664ba968437715819bfe4c7ada5679d16ebbc3.tar.gz | |
wildcardmatch: fix heap buffer overflow in setcharset
The code would previous read beyond the end of the pattern string if the
match pattern ends with an open bracket when the default pattern
matching function is used.
Detected by OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4161
CVE-2017-8817
Bug: https://curl.haxx.se/docs/adv_2017-ae72.html
Diffstat (limited to 'lib/curl_fnmatch.c')
| -rw-r--r-- | lib/curl_fnmatch.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/lib/curl_fnmatch.c b/lib/curl_fnmatch.c index da83393b4..8a1e106c4 100644 --- a/lib/curl_fnmatch.c +++ b/lib/curl_fnmatch.c @@ -133,6 +133,9 @@ static int setcharset(unsigned char **p, unsigned char *charset) unsigned char c; for(;;) { c = **p; + if(!c) + return SETCHARSET_FAIL; + switch(state) { case CURLFNM_SCHS_DEFAULT: if(ISALNUM(c)) { /* ASCII value */ @@ -196,9 +199,6 @@ static int setcharset(unsigned char **p, unsigned char *charset) else return SETCHARSET_FAIL; } - else if(c == '\0') { - return SETCHARSET_FAIL; - } else { charset[c] = 1; (*p)++; @@ -274,9 +274,6 @@ static int setcharset(unsigned char **p, unsigned char *charset) else if(c == ']') { return SETCHARSET_OK; } - else if(c == '\0') { - return SETCHARSET_FAIL; - } else if(ISPRINT(c)) { charset[c] = 1; (*p)++; |