anonfunc/xtables-addons
1
0
Fork 0
mirror of git://git.code.sf.net/p/xtables-addons/xtables-addons synced 2025-09-08 05:34:58 +02:00
Code Issues Releases Wiki Activity

ipp2p: add boundary check in search_all_kazaa

Browse Source 
To avoid underflow on "end - 18", we must check for plen >= 18.
This commit is contained in:
Jan Engelhardt
2009-01-10 06:11:13 +01:00
parent 879e964f60
commit 4cdfd49637
1 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
extensions/xt_ipp2p.c
View File

@@ -623,6 +623,10 @@ search_all_kazaa(const unsigned char *payload, const unsigned int plen)
if (memcmp(payload, "GET /", 5) != 0) if (memcmp(payload, "GET /", 5) != 0)
return 0; return 0;
if (plen < 18)
/* The next tests would not succeed anyhow. */
return 0;
end = plen - 18; end = plen - 18;
rem = plen - 5; rem = plen - 5;
for (c = 5; c < end; ++c, --rem) { for (c = 5; c < end; ++c, --rem) {