diff options
Diffstat (limited to 'gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch')
| -rw-r--r-- | gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch b/gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch new file mode 100644 index 0000000000..f1907d53e2 --- /dev/null +++ b/gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch @@ -0,0 +1,42 @@ +Fix buffer overread in libevents DNS code. + +Upstream bug report: + +https://github.com/libevent/libevent/issues/317 + +Patch copied from upstream source repository: + +https://github.com/libevent/libevent/commit/96f64a022014a208105ead6c8a7066018449d86d + +From 3c570970516f48da35f42fef98276531fcc0abaa Mon Sep 17 00:00:00 2001 +From: Azat Khuzhin <a3at.mail@gmail.com> +Date: Mon, 1 Feb 2016 17:32:09 +0300 +Subject: [PATCH] evdns: name_parse(): fix remote stack overread + +--- + evdns.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/evdns.c b/evdns.c +index 60b10485..137c24ea 100644 +--- a/evdns.c ++++ b/evdns.c +@@ -960,7 +960,6 @@ name_parse(u8 *packet, int length, int *idx, char *name_out, int name_out_len) { + + for (;;) { + u8 label_len; +- if (j >= length) return -1; + GET8(label_len); + if (!label_len) break; + if (label_len & 0xc0) { +@@ -981,6 +980,7 @@ name_parse(u8 *packet, int length, int *idx, char *name_out, int name_out_len) { + *cp++ = '.'; + } + if (cp + label_len >= end) return -1; ++ if (j + label_len > length) return -1; + memcpy(cp, packet + j, label_len); + cp += label_len; + j += label_len; +-- +2.11.0 + |