Vulnerability Details : CVE-2021-30500
Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file.
Vulnerability category: Memory CorruptionExecute codeDenial of service
Products affected by CVE-2021-30500
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:a:upx_project:upx:4.0.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-30500
0.20%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 58 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-30500
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-30500
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: secalert@redhat.com (Primary)
References for CVE-2021-30500
-
https://github.com/upx/upx/issues/485
PackLinuxElf::canUnpack did not check for ELF input · Issue #485 · upx/upx · GitHubExploit;Issue Tracking;Third Party Advisory
-
https://github.com/upx/upx/commit/90279abdfcd235172eab99651043051188938dcc
PackLinuxElf::canUnpack must checkEhdr() for ELF input · upx/upx@90279ab · GitHubPatch;Third Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=1948692
1948692 – (CVE-2021-30500) CVE-2021-30500 upx: Null pointer dereference in PackLinuxElf::canUnpack() in p_lx_elf.cppIssue Tracking;Third Party Advisory
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