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-rw-r--r--gnu/packages/patches/libarchive-CVE-2018-1000880.patch51
1 files changed, 51 insertions, 0 deletions
diff --git a/gnu/packages/patches/libarchive-CVE-2018-1000880.patch b/gnu/packages/patches/libarchive-CVE-2018-1000880.patch
new file mode 100644
index 0000000000..6834cabda0
--- /dev/null
+++ b/gnu/packages/patches/libarchive-CVE-2018-1000880.patch
@@ -0,0 +1,51 @@
+Fix CVE-2018-1000880:
+
+https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909
+https://github.com/libarchive/libarchive/pull/1105
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000880
+https://security-tracker.debian.org/tracker/CVE-2018-1000880
+
+Patch copied from upstream source repository:
+
+https://github.com/libarchive/libarchive/commit/9c84b7426660c09c18cc349f6d70b5f8168b5680
+
+From 9c84b7426660c09c18cc349f6d70b5f8168b5680 Mon Sep 17 00:00:00 2001
+From: Daniel Axtens <dja@axtens.net>
+Date: Tue, 4 Dec 2018 16:33:42 +1100
+Subject: [PATCH] warc: consume data once read
+
+The warc decoder only used read ahead, it wouldn't actually consume
+data that had previously been printed. This means that if you specify
+an invalid content length, it will just reprint the same data over
+and over and over again until it hits the desired length.
+
+This means that a WARC resource with e.g.
+Content-Length: 666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666665
+but only a few hundred bytes of data, causes a quasi-infinite loop.
+
+Consume data in subsequent calls to _warc_read.
+
+Found with an AFL + afl-rb + qsym setup.
+---
+ libarchive/archive_read_support_format_warc.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/libarchive/archive_read_support_format_warc.c b/libarchive/archive_read_support_format_warc.c
+index e8753853..e8fc8428 100644
+--- a/libarchive/archive_read_support_format_warc.c
++++ b/libarchive/archive_read_support_format_warc.c
+@@ -386,6 +386,11 @@ _warc_read(struct archive_read *a, const void **buf, size_t *bsz, int64_t *off)
+ return (ARCHIVE_EOF);
+ }
+
++ if (w->unconsumed) {
++ __archive_read_consume(a, w->unconsumed);
++ w->unconsumed = 0U;
++ }
++
+ rab = __archive_read_ahead(a, 1U, &nrd);
+ if (nrd < 0) {
+ *bsz = 0U;
+--
+2.20.1
+