Fedora 31 update for upx



| Updated: 2025-04-25
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2019-20021
CVE-2018-11243
CVE-2019-20051
CWE-ID CWE-125
CWE-415
CWE-682
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

upx
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU23826

Risk: Medium

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

CVE-ID: CVE-2019-20021

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists due to a heap-based buffer over-read within the canUnpack() function in p_mach.cpp. An attacker can create a specially crafted Mach-O file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 31

upx: before 3.96-2.fc31

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-67590fbf08


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) Double Free

EUVDB-ID: #VU23829

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-11243

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the PackLinuxElf64::unpack(0 function in p_lx_elf.cpp. A remote attacker can create a specially crafted file, pass it to the application, trigger double free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 31

upx: before 3.96-2.fc31

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-67590fbf08


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.

3) Incorrect calculation

EUVDB-ID: #VU23824

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-20051

CWE-ID: CWE-682 - Incorrect Calculation

Exploit availability: No

Description

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

The vulnerability exists due to incorrect calculation due to a floating point exception within the PackLinuxElf::elf_hash() function in p_lx_elf.cpp. A remote attacker can create a specially crafted file, pass it to the application, trigger a floating-point exception and crash the affected application.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 31

upx: before 3.96-2.fc31

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-67590fbf08


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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