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amazonAmazonALAS-2023-1724
HistoryMar 30, 2023 - 10:50 p.m.

Medium: yasm

2023-03-3022:50:00
alas.aws.amazon.com
14
yasm
null pointer dereference
yasm_expr_get_intnum
nasm_parser_directive
update
cve-2021-33454
cve-2021-33459

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

0.001

Percentile

23.8%

Issue Overview:

An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in yasm_expr_get_intnum() in libyasm/expr.c. (CVE-2021-33454)

An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in nasm_parser_directive() in modules/parsers/nasm/nasm-parse.c. (CVE-2021-33459)

Affected Packages:

yasm

Issue Correction:
Run yum update yasm to update your system.

New Packages:

i686:  
    yasm-devel-1.2.0-1.5.amzn1.i686  
    yasm-1.2.0-1.5.amzn1.i686  
    yasm-debuginfo-1.2.0-1.5.amzn1.i686  
  
src:  
    yasm-1.2.0-1.5.amzn1.src  
  
x86_64:  
    yasm-devel-1.2.0-1.5.amzn1.x86_64  
    yasm-1.2.0-1.5.amzn1.x86_64  
    yasm-debuginfo-1.2.0-1.5.amzn1.x86_64  

Additional References

Red Hat: CVE-2021-33454, CVE-2021-33459

Mitre: CVE-2021-33454, CVE-2021-33459

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

0.001

Percentile

23.8%