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| author | Anders Sundman <anders@4zm.org> | 2011-11-11 07:53:58 +0100 |
|---|---|---|
| committer | Anders Sundman <anders@4zm.org> | 2011-11-11 07:53:58 +0100 |
| commit | 930eed21c37d94c2f9c2b2a0f66135f554ce5079 (patch) | |
| tree | 87e708831969f8a80290194bf8348c9ec13742d8 | |
| parent | 8c7658dfdf651e629da11c46affbebcd799b6a59 (diff) | |
| download | tor-930eed21c37d94c2f9c2b2a0f66135f554ce5079.tar tor-930eed21c37d94c2f9c2b2a0f66135f554ce5079.tar.gz | |
Fixed buffer bounds check bug in tor_addr_to_str
| -rw-r--r-- | src/common/address.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/common/address.c b/src/common/address.c index b41456f8d..54ea5df86 100644 --- a/src/common/address.c +++ b/src/common/address.c @@ -350,15 +350,21 @@ tor_addr_to_str(char *dest, const tor_addr_t *addr, size_t len, int decorate) switch (tor_addr_family(addr)) { case AF_INET: - if (len<3) + /* Shortest addr x.x.x.x + \0 */ + if (len < 8) return NULL; - ptr = tor_inet_ntop(AF_INET, &addr->addr.in_addr, dest, len); + ptr = tor_inet_ntop(AF_INET, &addr->addr.in_addr, dest, len); break; case AF_INET6: + /* Shortest addr [ :: ] + \0 */ + if (len < (3 + (decorate ? 2 : 0))) + return NULL; + if (decorate) ptr = tor_inet_ntop(AF_INET6, &addr->addr.in6_addr, dest+1, len-2); else ptr = tor_inet_ntop(AF_INET6, &addr->addr.in6_addr, dest, len); + if (ptr && decorate) { *dest = '['; memcpy(dest+strlen(dest), "]", 2); |