diff options
| author | Phil Sutter <phil@nwl.cc> | 2019-12-05 13:57:18 +0100 |
|---|---|---|
| committer | Phil Sutter <phil@nwl.cc> | 2019-12-06 12:12:08 +0100 |
| commit | f7d3dbb82e7ed94ccbf10cf70a3c7b3f3aaef1a1 (patch) | |
| tree | a4448c3bbd2ace81e937aad8b2f67e60b7c80388 /libxtables | |
| parent | 28c16371cdad16707674450b59919e3d97185694 (diff) | |
libxtables: Avoid buffer overrun in xtables_compatible_revision()
The function is exported and accepts arbitrary strings as input. Calling
strcpy() without length checks is not OK.
Diffstat (limited to 'libxtables')
| -rw-r--r-- | libxtables/xtables.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libxtables/xtables.c b/libxtables/xtables.c index 895f6988..777c2b08 100644 --- a/libxtables/xtables.c +++ b/libxtables/xtables.c @@ -856,7 +856,8 @@ int xtables_compatible_revision(const char *name, uint8_t revision, int opt) xtables_load_ko(xtables_modprobe_program, true); - strcpy(rev.name, name); + strncpy(rev.name, name, XT_EXTENSION_MAXNAMELEN - 1); + rev.name[XT_EXTENSION_MAXNAMELEN - 1] = '\0'; rev.revision = revision; max_rev = getsockopt(sockfd, afinfo->ipproto, opt, &rev, &s); |