Bug 1909806 (CVE-2020-0499) - CVE-2020-0499 flac: out-of-bounds read can lead to denial of service
Summary: CVE-2020-0499 flac: out-of-bounds read can lead to denial of service
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-0499
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1909807 1909808 1910523 1912625
Blocks: 1909809
TreeView+ depends on / blocked
 
Reported: 2020-12-21 17:43 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-04-17 21:04 UTC (History)
8 users (show)

Fixed In Version:
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Last Closed: 2021-11-02 18:23:59 UTC
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Description Guilherme de Almeida Suckevicz 2020-12-21 17:43:48 UTC 
In FLAC__bitreader_read_rice_signed_block of bitreader.c, there is a possible out of bounds read due to a heap buffer overflow. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.

References:
https://source.android.com/security/bulletin/pixel/2020-12-01
https://android.googlesource.com/platform/external/flac/+/029048f823ced50f63a92e25073427ec3a9bd909

Upstream patch:
https://github.com/xiph/flac/commit/2e7931c27eb15e387da440a37f12437e35b22dd4
Comment 1 Guilherme de Almeida Suckevicz 2020-12-21 17:44:09 UTC 
Created flac tracking bugs for this issue:

Affects: fedora-all [bug 1909807]


Created mingw-flac tracking bugs for this issue:

Affects: fedora-all [bug 1909808]
Comment 4 Todd Cullum 2021-01-05 02:09:29 UTC 
Statement:

Red Hat Product Security has lowered the severity of this flaw to Low because while the initial report stated a threat of remote information disclosure, it does not appear to be a possibility in flac as shipped with Red Hat Enterprise Linux 8.
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