[Buildroot] [PATCH] package/openldap: add upstream security fix for CVE-2021-27212

[Yann E. MORIN]

Peter, All,

On 2021-02-27 00:13 +0100, Peter Korsgaard spake thusly:
> In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion
> failure in slapd can occur in the issuerAndThisUpdateCheck function via a
> crafted packet, resulting in a denial of service (daemon exit) via a short
> timestamp.  This is related to schema_init.c and checkTime.
> 
> For more details, see the bugtracker:
> https://bugs.openldap.org/show_bug.cgi?id=9454
> 
> Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

Applied to master, thanks.

Regards,
Yann E. MORIN.

> ---
>  ...TS-9454-fix-issuerAndThisUpdateCheck.patch | 26 +++++++++++++++++++
>  package/openldap/openldap.mk                  |  3 +++
>  2 files changed, 29 insertions(+)
>  create mode 100644 package/openldap/0005-ITS-9454-fix-issuerAndThisUpdateCheck.patch
> 
> diff --git a/package/openldap/0005-ITS-9454-fix-issuerAndThisUpdateCheck.patch b/package/openldap/0005-ITS-9454-fix-issuerAndThisUpdateCheck.patch
> new file mode 100644
> index 0000000000..a611b9ff59
> --- /dev/null
> +++ b/package/openldap/0005-ITS-9454-fix-issuerAndThisUpdateCheck.patch
> @@ -0,0 +1,26 @@
> +From 9badb73425a67768c09bcaed1a9c26c684af6c30 Mon Sep 17 00:00:00 2001
> +From: Howard Chu <hyc at openldap.org>
> +Date: Sat, 6 Feb 2021 20:52:06 +0000
> +Subject: [PATCH] ITS#9454 fix issuerAndThisUpdateCheck
> +
> +Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
> +---
> + servers/slapd/schema_init.c | 2 ++
> + 1 file changed, 2 insertions(+)
> +
> +diff --git a/servers/slapd/schema_init.c b/servers/slapd/schema_init.c
> +index 31be1154e..8b1e25539 100644
> +--- a/servers/slapd/schema_init.c
> ++++ b/servers/slapd/schema_init.c
> +@@ -3900,6 +3900,8 @@ issuerAndThisUpdateCheck(
> + 					break;
> + 				}
> + 			}
> ++			if ( tu->bv_len < STRLENOF("YYYYmmddHHmmssZ") ) return LDAP_INVALID_SYNTAX;
> ++
> + 			x.bv_val += tu->bv_len + 1;
> + 			x.bv_len -= tu->bv_len + 1;
> + 
> +-- 
> +2.20.1
> +
> diff --git a/package/openldap/openldap.mk b/package/openldap/openldap.mk
> index b4c06d8640..ec11e4fa7d 100644
> --- a/package/openldap/openldap.mk
> +++ b/package/openldap/openldap.mk
> @@ -13,6 +13,9 @@ OPENLDAP_CPE_ID_VENDOR = openldap
>  OPENLDAP_INSTALL_STAGING = YES
>  OPENLDAP_DEPENDENCIES = host-pkgconf
>  
> +# 0005-ITS-9454-fix-issuerAndThisUpdateCheck.patch
> +OPENLDAP_IGNORE_CVES += CVE-2021-27212
> +
>  ifeq ($(BR2_PACKAGE_OPENSSL),y)
>  OPENLDAP_TLS = openssl
>  OPENLDAP_DEPENDENCIES += openssl
> -- 
> 2.20.1
> 
> _______________________________________________
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