ff51a87cae
* gnu/packages/patches/libtasn1-CVE-2017-6891.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/tls.scm (libtasn1)[replacement]: New field. (libtasn1/fixed): New variable.
51 lines
1.4 KiB
Diff
51 lines
1.4 KiB
Diff
Fix CVE-2017-6891:
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6891
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Patch copied from upstream source repository:
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https://git.savannah.gnu.org/cgit/libtasn1.git/commit/?id=5520704d075802df25ce4ffccc010ba1641bd484
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From 5520704d075802df25ce4ffccc010ba1641bd484 Mon Sep 17 00:00:00 2001
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From: Nikos Mavrogiannopoulos <nmav@redhat.com>
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Date: Thu, 18 May 2017 18:03:34 +0200
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Subject: [PATCH] asn1_find_node: added safety check on asn1_find_node()
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This prevents a stack overflow in asn1_find_node() which
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is triggered by too long variable names in the definitions
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files. That means that applications have to deliberately
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pass a too long 'name' constant to asn1_write_value()
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and friends. Reported by Jakub Jirasek.
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Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
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---
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lib/parser_aux.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/lib/parser_aux.c b/lib/parser_aux.c
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index b4a7370..976ab38 100644
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--- a/lib/parser_aux.c
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+++ b/lib/parser_aux.c
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@@ -120,6 +120,9 @@ asn1_find_node (asn1_node pointer, const char *name)
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if (n_end)
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{
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nsize = n_end - n_start;
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+ if (nsize >= sizeof(n))
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+ return NULL;
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+
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memcpy (n, n_start, nsize);
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n[nsize] = 0;
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n_start = n_end;
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@@ -158,6 +161,9 @@ asn1_find_node (asn1_node pointer, const char *name)
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if (n_end)
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{
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nsize = n_end - n_start;
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+ if (nsize >= sizeof(n))
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+ return NULL;
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+
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memcpy (n, n_start, nsize);
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n[nsize] = 0;
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n_start = n_end;
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--
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2.13.0
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