Multiple vulnerabilities in yasm



Risk Low
Patch available NO
Number of vulnerabilities 2
CVE-ID CVE-2021-33459
CVE-2021-33454
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
 yasm
Universal components / Libraries / Programming Languages & Components

Vendor www.tortall.net

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU74584

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-33459

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the nasm_parser_directive() function in modules/parsers/nasm/nasm-parse.c. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

yasm: 0.1.0 - 1.3.0

CPE2.3 External links

https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d
https://github.com/yasm/yasm/issues/167


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) NULL pointer dereference

EUVDB-ID: #VU74583

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-33454

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the yasm_expr_get_intnum() function in libyasm/expr.c. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

yasm: 0.1.0 - 1.3.0

CPE2.3 External links

https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d
https://github.com/yasm/yasm/issues/166


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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