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efe887a5b8
Buffer Overflow vulnerability in msoulier tftpy commit 467017b844bf6e31745138a30e2509145b0c529c allows a remote attacker to cause a denial of service via the parse function in the TftpPacketFactory class. Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
27 lines
1012 B
Diff
27 lines
1012 B
Diff
From 5b4dcbe1c8fb178e4d31b9a9e63e603b73e8fb2f Mon Sep 17 00:00:00 2001
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From: Dave Wapstra <dwapstra@cisco.com>
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Date: Wed, 3 Jul 2024 14:32:58 +1200
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Subject: [PATCH] Add packet size check
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CVE: CVE-2023-46566
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Upstream-Status: Backport [https://github.com/msoulier/tftpy/commit/5b4dcbe1c8fb178e4d31b9a9e63e603b73e8fb2f]
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---
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tftpy/TftpPacketFactory.py | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/tftpy/TftpPacketFactory.py b/tftpy/TftpPacketFactory.py
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index 41f39a9..a8c9cd0 100644
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--- a/tftpy/TftpPacketFactory.py
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+++ b/tftpy/TftpPacketFactory.py
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@@ -29,6 +29,7 @@ class TftpPacketFactory(object):
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"""This method is used to parse an existing datagram into its
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corresponding TftpPacket object. The buffer is the raw bytes off of
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the network."""
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+ tftpassert(len(buffer) > 2, 'Invalid packet size')
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log.debug("parsing a %d byte packet" % len(buffer))
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(opcode,) = struct.unpack(str("!H"), buffer[:2])
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log.debug("opcode is %d" % opcode)
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--
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2.40.0
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