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The existing detection was still vulnerable to pathological cases
causing DoS by wasting CPU. The new algorithm takes the number of tags
into account to make it harder to abuse by cases using shallow recursion
but with a very large number of tags. This improves on commit 5d28011c
which wasn't sufficient to counter this kind of case.
The limitation in the previous fix was discovered by Laurent Delosieres,
Secunia Research at Flexera (Secunia Advisory SA84652) and is assigned
the identifier CVE-2018-20030.
Change-Id: I0ea69965f94d762c4f43c587504469259108456f
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>
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Tue Jul 25 21:38:56 2017 UTC (2 months, 2 weeks ago) by marcusmeissner
Branch: MAIN
CVS Tags: HEAD
Changes since 1.131: +6 -0 lines
Diff to previous 1.131
On saving makernotes, make sure the makernote container tags has a type
with 1 byte components.
Fixes (at least):
https://sourceforge.net/p/libexif/bugs/130
https://sourceforge.net/p/libexif/bugs/129
[Version] 0.6.21-3
[Profile] Common
[Issue Type] CVE
Change-Id: I2649b5cadbac7c7cd285d537b918dda56e637f3a
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>
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[Version] 0.6.21-2
[Profile] Common
[Issue Type] Update
[Dependency module] N/A
Change-Id: Ib8876c56489a4a5d2d8d2fe4eb03bb5b10f5a6e9
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>
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related files
Change-Id: Iab15d7e450e11c86b648a31f4fbd82eb6ae3b1a7
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>
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