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CVE-2020-11722

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute...

9.8 CriticalFix available

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

3.89%Up 0.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Record
CVE-2020-11722
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-434
Updated
2026-11-02
CVE List No score

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Record
CVE-2020-11722
Updated
2026-11-02
EUVDEUVD-2020-4064 No score

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Record
EUVD-2020-4064
Updated
2026-11-03
GitHub AdvisoriesGHSA-293j-rh9p-w2r8 No score

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute...

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Record
GHSA-293j-rh9p-w2r8
Updated
2026-11-02
OSV 9.8

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Record
CVE-2020-11722
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-11722 9.8

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Record
DEBIAN-CVE-2020-11722
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 5 moreShow less
OSVUBUNTU-CVE-2020-11722 9.8

Dungeon Crawl Stone Soup (aka DCSS or crawl) before 0.25 allows remote attackers to execute arbitrary code via Lua bytecode embedded in an uploaded .crawlrc file.

Record
UBUNTU-CVE-2020-11722
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2020-0190 No score

Updated crawl packages fix security vulnerability

Updated crawl packages fix security vulnerability

crawl 0.24.0 and earlier are subject to possible remote code evaluation with lua loadstring (CVE-2020-11722).

This update fixes it, also updating crawl from version 0.23.2 to 0.24.1, with the following main gameplay changes:

  • Vampire species simplified
  • Thrown weapons streamlined
  • Fedhas reimagined
  • Sif Muna reworked
Record
MGASA-2020-0190
Updated
2026-11-02
OSVopenSUSE-SU-2020:0549-1 No score

Security update for crawl

This update for crawl fixes the following issues:

  • CVE-2020-11722: Fixed a remote code evaluation issue with lua loadstring (boo#1169381)

Update to version 0.24.0

  • Vampire species simplified
  • Thrown weapons streamlined
  • Fedhas reimagined
  • Sif Muna reworked

Update to version 0.23.2

  • Trap system overhaul
  • New Gauntlet portal to replace Labyrinths
  • Nemelex Xobeh rework
  • Nine unrandarts reworked and the new 'Rift' unrandart added
  • Support for seeded dungeon play
  • build requires python and python-pyYAML

Update to 0.22.0

  • Player ghosts now only appear in sealed ghost vaults
  • New spell library interface
  • User interface revamp for Tiles and WebTiles
Record
openSUSE-SU-2020:0549-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10698-1 No score

crawl-0.26.1-1.2 on GA media

These are all security issues fixed in the crawl-0.26.1-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10698-1
Updated
2026-11-02
OSVUSN-7969-1 No score

crawl vulnerability

David Mendenhall discovered that Dungeon Crawl Stone Soup was incorrectly handling Lua bytecode embedded in an uploaded .crawlrc file. An attacker could possibly use this issue to execute arbitrary code.

Record
USN-7969-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
crawl
Debian:12
 before 2:0.25.0-1
2:0.25.0-1
crawl
Debian:13
 before 2:0.25.0-1
2:0.25.0-1
crawl
Debian:14
 before 2:0.25.0-1
2:0.25.0-1
crawl
Mageia:7
 before 0.24.1-2.ga250c9d538.1.mga7
0.24.1-2.ga250c9d538.1.mga7
crawl
Ubuntu:Pro:16.04:LTS
 before 2:0.17.1-1ubuntu0.1~esm1, plus listed versions
2:0.16.1-12:0.16.2-12:0.17.0-12:0.17.1-1
2:0.17.1-1ubuntu0.1~esm1
crawl
Ubuntu:Pro:18.04:LTS
 before 2:0.21.1-1ubuntu0.1~esm1, plus listed versions
2:0.20.1-12:0.21.0-12:0.21.1-1
2:0.21.1-1ubuntu0.1~esm1
crawl
Ubuntu:Pro:20.04:LTS
 before 2:0.24.0-1ubuntu0.1~esm1, plus listed versions
2:0.23.2-12:0.24.0-12:0.24.0-1build1
2:0.24.0-1ubuntu0.1~esm1
crawl
SUSE:Package Hub 15 SP1
 before 0.24.0-bp151.4.3.2
0.24.0-bp151.4.3.2
crawl
openSUSE:Leap 15.1
 before 0.24.0-bp151.4.3.2
0.24.0-bp151.4.3.2
crawl
openSUSE:Tumbleweed
 before 0.26.1-1.2
0.26.1-1.2

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-11722 is a critical vulnerability (CVSS 9.8) in Dungeon Crawl Stone Soup Project Crawl Stone Soup, published April 12, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.89%, the 90th percentile. Fixed in crawl 2:0.25.0-1.

References

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