HOMEVULNERABILITIESCVE-2018-11243
HIGH

CVE-2018-11243

CWE-415Published: May 18, 2018· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.

NVD Source

Technical Analysis

CVE-2018-11243 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

upx1 product(s)
upx
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/upx/upx/issues/206
ADVISORYhttps://github.com/upx/upx/issues/207
ADVISORYhttps://github.com/upx/upx/issues/206
ADVISORYhttps://github.com/upx/upx/issues/207

All References (18)

→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00001.html
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00008.html
→
https://github.com/upx/upx/blob/devel/NEWSRelease Notes
→
https://github.com/upx/upx/issues/206Exploit · Third Party Advisory
→
https://github.com/upx/upx/issues/207Exploit · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE/
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00001.html
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00008.html
→
https://github.com/upx/upx/blob/devel/NEWSRelease Notes
→
https://github.com/upx/upx/issues/206Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2018-11243
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-415
CISA KEVNo
Affected1 vendor(s)
PublishedMay 18, 2018

Related CVEs (CWE-415)

CVE-2018-0101
10.0
CVE-2019-12874
9.8
CVE-2019-7784
9.8
CVE-2019-19725
9.8
CVE-2019-7080
9.8
CVE-2019-25009
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-11243 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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