Bug 1209765 (CVE-2021-43311) - VUL-0: CVE-2021-43311: upx: Heap-based buffer overflow in PackLinuxElf32:elf_lookup() at p_lx_elf.cpp
Summary: VUL-0: CVE-2021-43311: upx: Heap-based buffer overflow in PackLinuxElf32:elf_...
Status: RESOLVED FIXED
Alias: CVE-2021-43311
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P3 - Medium : Normal
Target Milestone: ---
Assignee: Jan Engelhardt
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/361179/
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Depends on:
Blocks:
 
Reported: 2023-03-27 07:25 UTC by Cathy Hu
Modified: 2024-06-07 13:56 UTC (History)
2 users (show)

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Found By: Security Response Team
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Blocker: ---
Marketing QA Status: ---
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Description Cathy Hu 2023-03-27 07:25:15 UTC 
CVE-2021-43311

A heap-based buffer overflow was discovered in upx, during the generic pointer
'p' points to an inaccessible address in func get_le32(). The problem is
essentially caused in PackLinuxElf32::elf_lookup() at p_lx_elf.cpp:5382.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-43311
https://www.cve.org/CVERecord?id=CVE-2021-43311
https://github.com/upx/upx/issues/380
Comment 1 Cathy Hu 2023-03-27 07:25:29 UTC 
Affected:
- openSUSE:Backports:SLE-15-SP4/upx  3.96 
- openSUSE:Factory/upx               4.0.2
Comment 2 Swamp Workflow Management 2023-04-11 13:11:42 UTC 
openSUSE-SU-2023:0088-1: An update that fixes 12 vulnerabilities is now available.

Category: security (important)
Bug References: 1183510,1184701,1184702,1207121,1207122,1209765,1209766,1209767,1209768,1209769,1209770,1209771
CVE References: CVE-2021-20285,CVE-2021-30500,CVE-2021-30501,CVE-2021-43311,CVE-2021-43312,CVE-2021-43313,CVE-2021-43314,CVE-2021-43315,CVE-2021-43316,CVE-2021-43317,CVE-2023-23456,CVE-2023-23457
JIRA References: 
Sources used:
openSUSE Backports SLE-15-SP4 (src):    upx-4.0.2-bp154.4.6.1
Comment 3 Camila Camargo de Matos 2024-06-07 13:56:10 UTC 
As per a comment [0] in the upstream issue related to this vulnerability [1], the reported problem is not present in version 4.0.2 of upx.

All currently supported codestreams are at version 4.0.2 or higher, meaning they are not affected by this issue.

[0] https://github.com/upx/upx/issues/380#issuecomment-1511845513
[1] https://github.com/upx/upx/issues/380