diff options
Diffstat (limited to 'gnu/packages/patches')
| -rw-r--r-- | gnu/packages/patches/exim-CVE-2017-16943.patch | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/gnu/packages/patches/exim-CVE-2017-16943.patch b/gnu/packages/patches/exim-CVE-2017-16943.patch new file mode 100644 index 0000000000..3a3e5d27fa --- /dev/null +++ b/gnu/packages/patches/exim-CVE-2017-16943.patch @@ -0,0 +1,65 @@ +Fix CVE-2017-16943: + +https://bugs.exim.org/show_bug.cgi?id=2199 +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16943 + +Patch copied from upstream source repository: + +https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde + +From 4090d62a4b25782129cc1643596dc2f6e8f63bde Mon Sep 17 00:00:00 2001 +From: Jeremy Harris <jgh146exb@wizmail.org> +Date: Fri, 24 Nov 2017 20:22:33 +0000 +Subject: [PATCH] Avoid release of store if there have been later allocations. + Bug 2199 + +--- + doc/doc-txt/ChangeLog | 4 ++++ + src/src/receive.c | 7 ++++--- + 2 files changed, 8 insertions(+), 3 deletions(-) + +#diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog +#index e937ba2..a2d9339 100644 +#--- a/doc/doc-txt/ChangeLog +#+++ b/doc/doc-txt/ChangeLog +#@@ -59,6 +59,10 @@ JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for +# connection in response to HELO" was logged instead of the actual 4xx +# error for the HELO. +# +#+JH/34 Bug 2199: fix a use-after-free while reading smtp input for header lines. +#+ A crafted sequence of BDAT commands could result in in-use memory beeing +#+ freed. +#+ +# + Exim version 4.89 + ----------------- +diff --git a/src/src/receive.c b/src/src/receive.c +index 95cf13e..20672db 100644 +--- a/src/receive.c ++++ b/src/receive.c +@@ -1772,8 +1772,8 @@ for (;;) + (and sometimes lunatic messages can have ones that are 100s of K long) we + call store_release() for strings that have been copied - if the string is at + the start of a block (and therefore the only thing in it, because we aren't +- doing any other gets), the block gets freed. We can only do this because we +- know there are no other calls to store_get() going on. */ ++ doing any other gets), the block gets freed. We can only do this release if ++ there were no allocations since the once that we want to free. */ + + if (ptr >= header_size - 4) + { +@@ -1782,9 +1782,10 @@ for (;;) + header_size *= 2; + if (!store_extend(next->text, oldsize, header_size)) + { ++ BOOL release_ok = store_last_get[store_pool] == next->text; + uschar *newtext = store_get(header_size); + memcpy(newtext, next->text, ptr); +- store_release(next->text); ++ if (release_ok) store_release(next->text); + next->text = newtext; + } + } +-- +1.9.1 + |