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CVE-2012-4409, CVE-2012-4426, CVE-2012-4527 Patches taken from https://gitweb.gentoo.org/repo/gentoo.git/tree/app-crypt/mcrypt/files
40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
From 5bee29fae8f0e936ad4c957aef6035d09532a57a Mon Sep 17 00:00:00 2001
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From: Alon Bar-Lev <alon.barlev@gmail.com>
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Date: Sat, 22 Dec 2012 22:04:27 +0200
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Subject: [PATCH] cleanup: fixup segv on buffer access
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use exact buffer size instead of guess.
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do not copy out of source buffer.
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Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
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---
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mcrypt-2.6.8/src/rfc2440.c | 5 +++--
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1 files changed, 3 insertions(+), 2 deletions(-)
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diff --git a/mcrypt-2.6.8/src/rfc2440.c b/mcrypt-2.6.8/src/rfc2440.c
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index 5a1f296..929b9ab 100644
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--- a/src/rfc2440.c
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+++ b/src/rfc2440.c
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@@ -497,7 +497,7 @@ plaintext_encode(const USTRING dat)
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time_t t;
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assert(dat->len > 0);
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- result = make_ustring( NULL, 2 * dat->len); /* xxx */
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+ result = make_ustring( NULL, dat->len + 12); /* xxx */
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newdat = (USTRING)dat;
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result->d[pos++] = (0x80 | 0x40 | PKT_PLAINTEXT);
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@@ -810,7 +810,8 @@ encrypted_encode(const USTRING pt, const DEK *dek)
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_mcrypt_encrypt(dek->hd, rndpref, dek->blocklen + 2, NULL, 0);
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_mcrypt_sync(dek->hd, rndpref, dek->blocklen);
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- ct = make_ustring( rndpref, 2 * pt->len); /* xxx */
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+ ct = make_ustring( NULL, dek->blocklen + 2 + pt->len + 12); /* xxx */
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+ memcpy(ct->d, rndpref, dek->blocklen + 2);
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pos = dek->blocklen + 2;
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_mcrypt_encrypt(dek->hd, ct->d + pos, pt->len, pt->d, pt->len);
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--
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1.7.8.6
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