CVE-2020-12872
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by...
CVE-2020-12872 is a medium vulnerability (CVSS 5.5) in Yaws, published May 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. Fixed in erlang 1:21.2.6+dfsg-1.
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
- Record
CVE-2020-12872- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-326
- Updated
- 2026-11-02
CVE List No score
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
- Record
CVE-2020-12872- Updated
- 2026-11-02
EUVDEUVD-2020-5153 No score
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
- Record
EUVD-2020-5153- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2g9r-9f99-v27g
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by...
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks.
- Record
GHSA-2g9r-9f99-v27g- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-326
- Updated
- 2026-11-02
OSV
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
- Record
CVE-2020-12872- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-12872
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
- Record
DEBIAN-CVE-2020-12872- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-12872
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
- Record
UBUNTU-CVE-2020-12872- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
erlangDebian:12 |
before 1:21.2.6+dfsg-1 | 1:21.2.6+dfsg-1 |
erlangDebian:13 |
before 1:21.2.6+dfsg-1 | 1:21.2.6+dfsg-1 |
erlangDebian:14 |
before 1:21.2.6+dfsg-1 | 1:21.2.6+dfsg-1 |
yawsUbuntu:16.04:LTS |
All versions, plus listed versions 1.98-51.99-11.99-22.0.2-1 |
None known |
yawsUbuntu:18.04:LTS |
All versions, plus listed versions 2.0.4+dfsg-22.0.4+dfsg-2ubuntu0.1 |
None known |
yawsUbuntu:20.04:LTS |
All versions, plus listed versions 2.0.6+dfsg-12.0.6+dfsg-32.0.7+dfsg-1 |
None known |
yawsUbuntu:22.04:LTS |
All versions, plus listed versions 2.0.8+dfsg-32.0.9+dfsg-12.1.0+dfsg-12.1.1+dfsg-1 |
None known |
yawsUbuntu:24.04:LTS |
All versions, plus listed versions 2.1.1+dfsg-2 |
None known |
yawsUbuntu:25.10 |
All versions, plus listed versions 2.2.0+dfsg-2 |
None known |
yawsUbuntu:26.10 |
All versions, plus listed versions 2.2.0+dfsg-2build12.3.1+dfsg-2 |
None known |
yawsUbuntu:26.04:LTS |
All versions, plus listed versions 2.2.0+dfsg-22.2.0+dfsg-2build1 |
None known |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |