A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
References
Link | Resource |
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https://bugzilla.redhat.com/show_bug.cgi?id=1882018 | Issue Tracking Patch Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html | Mailing List Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/ | |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/ | |
https://security.gentoo.org/glsa/202101-17 | Third Party Advisory |
https://www.debian.org/security/2021/dsa-4844 | Third Party Advisory |
https://www.jsof-tech.com/disclosures/dnspooq/ | Third Party Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Configuration 3 (hide)
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History
07 Nov 2023, 03:20
Type | Values Removed | Values Added |
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26 Mar 2021, 18:36
Type | Values Removed | Values Added |
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CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |
References | (MLIST) https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html - Mailing List, Third Party Advisory |
22 Mar 2021, 21:15
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CPE |
25 Feb 2021, 16:07
Type | Values Removed | Values Added |
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References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/ - Mailing List, Third Party Advisory | |
CPE | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* |
20 Feb 2021, 03:15
Type | Values Removed | Values Added |
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References |
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08 Feb 2021, 22:09
Type | Values Removed | Values Added |
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CPE | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | |
References | (DEBIAN) https://www.debian.org/security/2021/dsa-4844 - Third Party Advisory |
04 Feb 2021, 16:15
Type | Values Removed | Values Added |
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References |
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03 Feb 2021, 14:48
Type | Values Removed | Values Added |
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CVSS |
v2 : v3 : |
v2 : 7.1
v3 : 5.9 |
26 Jan 2021, 20:39
Type | Values Removed | Values Added |
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References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/ - Mailing List, Third Party Advisory | |
References | (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1882018 - Issue Tracking, Patch, Third Party Advisory | |
References | (MISC) https://www.jsof-tech.com/disclosures/dnspooq/ - Third Party Advisory | |
References | (GENTOO) https://security.gentoo.org/glsa/202101-17 - Third Party Advisory | |
CPE | cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* |
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CVSS |
v2 : v3 : |
v2 : 7.1
v3 : 7.5 |
26 Jan 2021, 18:15
Type | Values Removed | Values Added |
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References |
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20 Jan 2021, 16:15
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2021-01-20 16:15
Updated : 2023-12-10 13:41
NVD link : CVE-2020-25683
Mitre link : CVE-2020-25683
CVE.ORG link : CVE-2020-25683
JSON object : View
Products Affected
thekelleys
- dnsmasq
debian
- debian_linux
fedoraproject
- fedora
CWE
CWE-122
Heap-based Buffer Overflow