Vulnerability Monitor

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CVE-2021-30501

An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of service (abort) via a crafted file.

Published

2021-05-27T00:15:08.527

Last Modified

2025-04-11T12:27:55.013

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-20
Type: Primary
CWE-617

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	upx	upx	4.0.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	fedoraproject	fedora	33	Yes

References

https://bugzilla.redhat.com/show_bug.cgi?id=1948696 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46 Patch, Third Party Advisory ([email protected])
https://github.com/upx/upx/issues/486 Exploit, Issue Tracking, Third Party Advisory ([email protected])
https://github.com/upx/upx/pull/487 Exploit, Patch, Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1948696 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/upx/upx/commit/28e761cd42211dfe0124b7a29b2f74730f453e46 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/upx/upx/issues/486 Exploit, Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/upx/upx/pull/487 Exploit, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)