Bug 1824469 (CVE-2019-20334) - CVE-2019-20334 nasm: stack consumption occurs in expr# functions in asm/eval.c
Summary: CVE-2019-20334 nasm: stack consumption occurs in expr# functions in asm/eval.c
Keywords:
Status: NEW
Alias: CVE-2019-20334
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 1824470 1824813 1824814
Blocks: 1824471
TreeView+ depends on / blocked
 
Reported: 2020-04-16 09:40 UTC by Dhananjay Arunesh
Modified: 2023-07-07 08:32 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
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Last Closed:
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Description Dhananjay Arunesh 2020-04-16 09:40:25 UTC 
In Netwide Assembler (NASM) 2.14.02, stack consumption occurs in expr# functions in asm/eval.c. This potentially affects the relationships among expr0, expr1, expr2, expr3, expr4, expr5, and expr6 (and stdscan in asm/stdscan.c). This is similar to CVE-2019-6290 and CVE-2019-6291.

https://bugzilla.nasm.us/show_bug.cgi?id=3392548#c4
https://bugzilla.nasm.us/show_bug.cgi?id=3392638
Comment 1 Dhananjay Arunesh 2020-04-16 09:40:50 UTC 
Created nasm tracking bugs for this issue:

Affects: fedora-all [bug 1824470]
Comment 2 Stefan Cornelius 2020-04-16 13:50:39 UTC 
This only works for me when arbitrarily limiting the stack space via ulimit. This has a CVE and technically we're affected, but overall the impact is so low that it hardly seems relevant.
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