CVE-2020-12663

Home/CVE/Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.

CVE

Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.

HIGH · CVSS 7.5 EPSS 0.10038

Schedule remediation

EPSS ≥ 0.10 - elevated exploitation probability
EPSS percentile: top 7% of all CVEs by exploitation likelihood
CVSS base score ≥ 7.0

Sigma rules0 YARA rules0

⬡

Weakness Classification

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')

▤

Affected Products & Versions

nlnetlabs unbound< 1.10.1
debian linuxall versions
opensuse leapall versions
canonical ubuntu linuxall versions
fedoraproject fedoraall versions

▣

Scoring & Timeline

7.5

HIGH · CVSS v3.1 · cve@mitre.org

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD19 May 2020 · 02:15 PM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

⚑

Vendor Advisories

suse-csafopenSUSE-SU-2024:11005-1
msrcCVE-2020-12663
suse-csafSUSE-SU-2020:1819-1
suse-csafopenSUSE-SU-2020:0912-1
suse-csafopenSUSE-SU-2020:0913-1
Show all 13 vendor advisoriessuse-csafSUSE-SU-2020:1772-1
usnUSN-4374-1
rhsaRHSA-2020:2640Important
rhsaRHSA-2020:2419Important
rhsaRHSA-2020:2418Important
rhsaRHSA-2020:4181Important
rhsaRHSA-2020:2416Important
rhsaRHSA-2020:2414Important

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.htmlMailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.htmlMailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2020/05/19/5Mailing ListPatchThird Party Advisory

https://lists.debian.org/debian-lts-announce/2021/02/msg00017.htmlMailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/

Show all 10 references

https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txtVendor Advisory

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.ascThird Party Advisory

https://usn.ubuntu.com/4374-1/Third Party Advisory

https://www.debian.org/security/2020/dsa-4694Third Party Advisory

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