Bug 2208605 (CVE-2023-31973) - CVE-2023-31973 yasm: use-after-free in expand_mmac_params() in modules/preprocs/nasm/nasm-pp.c
Summary: CVE-2023-31973 yasm: use-after-free in expand_mmac_params() in modules/prepro...
Keywords:
Status: NEW
Alias: CVE-2023-31973
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Nobody
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Depends On: 2208606 2208607 2208618 2208619
Blocks: 2196620
TreeView+ depends on / blocked
 
Reported: 2023-05-19 18:00 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-07-07 08:33 UTC (History)
3 users (show)

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Description Guilherme de Almeida Suckevicz 2023-05-19 18:00:14 UTC 
yasm v1.3.0 was discovered to contain a use after free via the function expand_mmac_params at /nasm/nasm-pp.c.

Reference:
https://github.com/yasm/yasm/issues/207
Comment 1 Guilherme de Almeida Suckevicz 2023-05-19 18:00:32 UTC 
Created yasm tracking bugs for this issue:

Affects: epel-all [bug 2208606]
Affects: fedora-all [bug 2208607]
Comment 3 Siddhesh Poyarekar 2023-05-19 19:31:48 UTC 
This should be rejected as per yasm security policy, unless there's a way this could be exploited using *trusted* input:

https://github.com/yasm/yasm/blob/master/SECURITY.md
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