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package/exim: add upstream security fix for CVE-2019-10149

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A flaw was found in Exim versions 4.87 to 4.91 (inclusive).  Improper
validation of recipient address in deliver_message() function in
src/deliver.c may lead to remote command execution.

For more details, see the advisory:

https://www.exim.org/static/doc/security/CVE-2019-10149.txt

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Peter Korsgaard 2019-06-05 18:28:05 +02:00
parent 1272878fd0
commit 83967ef53d
1 changed files with 51 additions and 0 deletions
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51
package/exim/0007-Fix-CVE-2019-10149.patch Normal file
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@ -0,0 +1,51 @@
From d740d2111f189760593a303124ff6b9b1f83453d Mon Sep 17 00:00:00 2001
From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Mon, 27 May 2019 21:57:31 +0100
Subject: [PATCH] Fix CVE-2019-10149
[Peter: drop documentation update, fix path]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
src/deliver.c | 22 ++++++++++++++--------
1 files changed, 52 insertions(+), 8 deletions(-)
create mode 100644 doc/doc-txt/cve-2019-10149
diff --git a/src/deliver.c b/src/deliver.c
index 59256ac2..45cc0723 100644
--- a/src/deliver.c
+++ b/src/deliver.c
@@ -6227,17 +6227,23 @@ if (process_recipients != RECIP_IGNORE)
{
uschar * save_local = deliver_localpart;
const uschar * save_domain = deliver_domain;
+ uschar * addr = new->address, * errmsg = NULL;
+ int start, end, dom;
- deliver_localpart = expand_string(
- string_sprintf("${local_part:%s}", new->address));
- deliver_domain = expand_string(
- string_sprintf("${domain:%s}", new->address));
+ if (!parse_extract_address(addr, &errmsg, &start, &end, &dom, TRUE))
+ log_write(0, LOG_MAIN|LOG_PANIC,
+ "failed to parse address '%.100s': %s\n", addr, errmsg);
+ else
+ {
+ deliver_localpart =
+ string_copyn(addr+start, dom ? (dom-1) - start : end - start);
+ deliver_domain = dom ? CUS string_copyn(addr+dom, end - dom) : CUS"";
- (void) event_raise(event_action,
- US"msg:fail:internal", new->message);
+ event_raise(event_action, US"msg:fail:internal", new->message);
- deliver_localpart = save_local;
- deliver_domain = save_domain;
+ deliver_localpart = save_local;
+ deliver_domain = save_domain;
+ }
}
#endif
}
--
2.11.0