gnu: Mutt: Fix CVE-2021-3181.

* gnu/packages/patches/mutt-CVE-2021-3181.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/mail.scm (mutt)[source]: Use it.

gnu/local.mk

@@ -1385,6 +1385,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/mupen64plus-video-z64-glew-correct-path.patch    \
   %D%/packages/patches/musl-cross-locale.patch			\
   %D%/packages/patches/mutt-store-references.patch		\
+  %D%/packages/patches/mutt-CVE-2021-3181.patch			\
   %D%/packages/patches/m4-gnulib-libio.patch			\
   %D%/packages/patches/ncompress-fix-softlinks.patch		\
   %D%/packages/patches/netcdf-date-time.patch			\

gnu/packages/mail.scm

@@ -456,7 +456,8 @@ aliasing facilities to work just as they would on normal mail.")
              (sha256
               (base32
                "1m4ig69qw4g3lhm4351snmy5i0ch65fqc9vqqdybr6jy21w7w225"))
-             (patches (search-patches "mutt-store-references.patch"))))
+             (patches (search-patches "mutt-store-references.patch"
+                                      "mutt-CVE-2021-3181.patch"))))
     (build-system gnu-build-system)
     (inputs
      `(("cyrus-sasl" ,cyrus-sasl)

gnu/packages/patches/mutt-CVE-2021-3181.patch

@@ -0,0 +1,45 @@
+Fix CVE-2021-3181:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3181
+
+Patch copied from upstream source repository:
+
+https://gitlab.com/muttmua/mutt/-/commit/c059e20ea4c7cb3ee9ffd3500ffe313ae84b2545
+
+From c059e20ea4c7cb3ee9ffd3500ffe313ae84b2545 Mon Sep 17 00:00:00 2001
+From: Kevin McCarthy <kevin@8t8.us>
+Date: Sun, 17 Jan 2021 10:40:37 -0800
+Subject: [PATCH] Fix memory leak parsing group address.
+
+When there was a group address terminator with no previous addresses,
+an address would be allocated but not attached to the address list.
+
+Change this to only allocate when last exists.
+
+It would be more correct to not allocate at all unless we are inside a
+group list, but I will address that in a separate commit to master.
+---
+ rfc822.c | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+diff --git a/rfc822.c b/rfc822.c
+index 7ff4eaa3..ced619f2 100644
+--- a/rfc822.c
++++ b/rfc822.c
+@@ -587,11 +587,10 @@ ADDRESS *rfc822_parse_adrlist (ADDRESS *top, const char *s)
+ #endif
+ 
+       /* add group terminator */
+-      cur = rfc822_new_address ();
+       if (last)
+       {
+-	last->next = cur;
+-	last = cur;
++	last->next = rfc822_new_address ();
++	last = last->next;
+       }
+ 
+       phraselen = 0;
+-- 
+GitLab
+