diff options
Diffstat (limited to 'meta-networking/recipes-support/dovecot/dovecot/0011-lib-mail-message-parser-Support-limiting-max-number-.patch')
| -rw-r--r-- | meta-networking/recipes-support/dovecot/dovecot/0011-lib-mail-message-parser-Support-limiting-max-number-.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/meta-networking/recipes-support/dovecot/dovecot/0011-lib-mail-message-parser-Support-limiting-max-number-.patch b/meta-networking/recipes-support/dovecot/dovecot/0011-lib-mail-message-parser-Support-limiting-max-number-.patch new file mode 100644 index 0000000000..52848bf3a7 --- /dev/null +++ b/meta-networking/recipes-support/dovecot/dovecot/0011-lib-mail-message-parser-Support-limiting-max-number-.patch @@ -0,0 +1,87 @@ +From d7bba401dd234802bcdb55ff27dfb99bffdab804 Mon Sep 17 00:00:00 2001 +From: Timo Sirainen <timo.sirainen@open-xchange.com> +Date: Thu, 23 Apr 2020 17:09:33 +0300 +Subject: [PATCH 11/13] lib-mail: message-parser - Support limiting max number + of MIME parts + +The default is to allow 10000 MIME parts. When it's reached, no more +MIME boundary lines will be recognized, so the rest of the mail belongs +to the last added MIME part. +--- + src/lib-mail/message-parser.c | 14 ++++++++++++++ + 1 file changed, 14 insertions(+) + +Signed-off-by: Sana Kazi <Sana.Kazi@kpit.com> + +CVE: CVE-2020-12100 +Upstream-Status: Backport [http://archive.ubuntu.com/ubuntu/pool/main/d/dovecot/dovecot_2.2.33.2-1ubuntu4.7.debian.tar.xz] +Comment: No change in any hunk + +diff --git a/src/lib-mail/message-parser.c b/src/lib-mail/message-parser.c +index 721615f76..646307802 100644 +--- a/src/lib-mail/message-parser.c ++++ b/src/lib-mail/message-parser.c +@@ -14,6 +14,7 @@ + #define BOUNDARY_END_MAX_LEN (BOUNDARY_STRING_MAX_LEN + 2 + 2) + + #define MESSAGE_PARSER_DEFAULT_MAX_NESTED_MIME_PARTS 100 ++#define MESSAGE_PARSER_DEFAULT_MAX_TOTAL_MIME_PARTS 10000 + + struct message_boundary { + struct message_boundary *next; +@@ -31,10 +32,12 @@ struct message_parser_ctx { + struct message_part *parts, *part; + const char *broken_reason; + unsigned int nested_parts_count; ++ unsigned int total_parts_count; + + enum message_header_parser_flags hdr_flags; + enum message_parser_flags flags; + unsigned int max_nested_mime_parts; ++ unsigned int max_total_mime_parts; + + char *last_boundary; + struct message_boundary *boundaries; +@@ -211,7 +214,9 @@ message_part_append(struct message_parser_ctx *ctx) + + ctx->part = part; + ctx->nested_parts_count++; ++ ctx->total_parts_count++; + i_assert(ctx->nested_parts_count < ctx->max_nested_mime_parts); ++ i_assert(ctx->total_parts_count <= ctx->max_total_mime_parts); + } + + static void message_part_finish(struct message_parser_ctx *ctx) +@@ -296,6 +301,12 @@ boundary_line_find(struct message_parser_ctx *ctx, + return -1; + } + ++ if (ctx->total_parts_count >= ctx->max_total_mime_parts) { ++ /* can't add any more MIME parts. just stop trying to find ++ more boundaries. */ ++ return -1; ++ } ++ + /* need to find the end of line */ + data += 2; + size -= 2; +@@ -1125,6 +1136,8 @@ message_parser_init_int(struct istream *input, + ctx->flags = flags; + ctx->max_nested_mime_parts = + MESSAGE_PARSER_DEFAULT_MAX_NESTED_MIME_PARTS; ++ ctx->max_total_mime_parts = ++ MESSAGE_PARSER_DEFAULT_MAX_TOTAL_MIME_PARTS; + ctx->input = input; + i_stream_ref(input); + return ctx; +@@ -1142,6 +1155,7 @@ message_parser_init(pool_t part_pool, struct istream *input, + ctx->parts = ctx->part = p_new(part_pool, struct message_part, 1); + ctx->next_part = &ctx->part->children; + ctx->parse_next_block = parse_next_header_init; ++ ctx->total_parts_count = 1; + i_array_init(&ctx->next_part_stack, 4); + return ctx; + } +-- +2.11.0 + |