CVE-2020-8616
published 2020-05-19CVE-2020-8616: A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the…
PriorityP352high8.6CVSS 3.1
AVNACLPRNUINSCCNINAH
EPSS
10.59%
95.3th percentile
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
Affected
28 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | bind9 | < bind9 1:9.16.3-1 (bookworm) | bind9 1:9.16.3-1 (bookworm) |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | — | — |
| isc | bind | 9.0.0 – 9.11.18 | — |
| isc | bind | 9.12.0 – 9.12.4 | — |
| isc | bind | 9.13.0 – 9.13.7 | — |
| isc | bind | 9.14.0 – 9.14.11 | — |
| isc | bind | 9.15.0 – 9.15.6 | — |
| isc | bind | 9.16.0 – 9.16.2 | — |
| isc | bind | 9.17.0 – 9.17.1 | — |
| isc | bind9 | — | — |
| isc | bind9 | >= 0 < 1:9.16.3-1 | 1:9.16.3-1 |
| isc | bind9 | >= 0 < 1:9.16.3-1 | 1:9.16.3-1 |
| isc | bind9 | >= 0 < 1:9.16.3-1 | 1:9.16.3-1 |
| isc | bind9 | >= 0 < 1:9.16.3-1 | 1:9.16.3-1 |
| isc | bind9 | >= 0 < 1:9.10.3.dfsg.P4-8ubuntu1.16 | 1:9.10.3.dfsg.P4-8ubuntu1.16 |
CVSS provenance
nvdv3.18.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv8.6HIGH
vendor_debian8.6HIGH
vendor_redhat8.6HIGH
vendor_ubuntu8.6HIGH
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Ubuntu
Bind vulnerabilities
vendor_ubuntu·2020-05-20·CVSS 8.6
CVE-2020-8616 [HIGH] Bind vulnerabilities
Title: Bind vulnerabilities
Summary: Several security issues were fixed in Bind.
USN-4365-1 fixed several vulnerabilities in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.
Original advisory details:
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind
incorrectly limited certain fetches. A remote attacker could possibly use
this issue to cause Bind to consume resources, leading to a denial of
service, or possibly use Bind to perform a reflection attack.
(CVE-2020-8616)
Tobias Klein discovered that Bind incorrectly handled checking TSIG
validity. A remote attacker could use this issue to cause Bind to crash,
resulting in a denial of service, or possibly perform other attacks.
(CVE-2020-8617)
Instructions: In general, a standard
Ubuntu
Bind vulnerabilities
vendor_ubuntu·2020-05-19·CVSS 8.6
CVE-2020-8616 [HIGH] Bind vulnerabilities
Title: Bind vulnerabilities
Summary: Several security issues were fixed in Bind.
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind
incorrectly limited certain fetches. A remote attacker could possibly use
this issue to cause Bind to consume resources, leading to a denial of
service, or possibly use Bind to perform a reflection attack.
(CVE-2020-8616)
Tobias Klein discovered that Bind incorrectly handled checking TSIG
validity. A remote attacker could use this issue to cause Bind to crash,
resulting in a denial of service, or possibly perform other attacks.
(CVE-2020-8617)
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
bind: BIND does not sufficiently limit the number of fetches performed when processing referrals
vendor_redhat·2020-05-19·CVSS 8.6
CVE-2020-8616 [HIGH] CWE-400 bind: BIND does not sufficiently limit the number of fetches performed when processing referrals
bind: BIND does not sufficiently limit the number of fetches performed when processing referrals
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
A flaw was found in BIND, where it does not sufficiently limit the number of fetches that can
Debian
CVE-2020-8616: bind9 - A malicious actor who intentionally exploits this lack of effective limitation o...
vendor_debian·2020·CVSS 8.6
CVE-2020-8616 [HIGH] CVE-2020-8616: bind9 - A malicious actor who intentionally exploits this lack of effective limitation o...
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
Scope: local
bookworm: resolved (fixed in 1:9.16.3-1)
bullseye: resolved (fixed in 1:9.16.3-1)
forky: resolved (fixed in 1:9.16.3-1)
sid: resolved (fixed in 1:9.16.3-1)
trixie: resolved (fixed
GHSA
GHSA-rc96-hg8v-6p4g: A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, throu
ghsa_unreviewed·2022-05-24
CVE-2020-8616 [MEDIUM] GHSA-rc96-hg8v-6p4g: A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, throu
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
OSV
bind9 vulnerabilities
osv·2020-05-20·CVSS 8.6
CVE-2020-8616 [HIGH] bind9 vulnerabilities
bind9 vulnerabilities
USN-4365-1 fixed several vulnerabilities in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.
Original advisory details:
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind
incorrectly limited certain fetches. A remote attacker could possibly use
this issue to cause Bind to consume resources, leading to a denial of
service, or possibly use Bind to perform a reflection attack.
(CVE-2020-8616)
Tobias Klein discovered that Bind incorrectly handled checking TSIG
validity. A remote attacker could use this issue to cause Bind to crash,
resulting in a denial of service, or possibly perform other attacks.
(CVE-2020-8617)
OSV
CVE-2020-8616: A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, throu
osv·2020-05-19·CVSS 8.6
CVE-2020-8616 [HIGH] CVE-2020-8616: A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, throu
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
OSV
bind9 vulnerabilities
osv·2020-05-19·CVSS 8.6
CVE-2020-8616 [HIGH] bind9 vulnerabilities
bind9 vulnerabilities
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind
incorrectly limited certain fetches. A remote attacker could possibly use
this issue to cause Bind to consume resources, leading to a denial of
service, or possibly use Bind to perform a reflection attack.
(CVE-2020-8616)
Tobias Klein discovered that Bind incorrectly handled checking TSIG
validity. A remote attacker could use this issue to cause Bind to crash,
resulting in a denial of service, or possibly perform other attacks.
(CVE-2020-8617)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-8616 bind: BIND does not sufficiently limit the number of fetches performed when processing referrals [fedora-all]
bugzilla·2020-05-19·CVSS 8.6
CVE-2020-8616 [HIGH] CVE-2020-8616 bind: BIND does not sufficiently limit the number of fetches performed when processing referrals [fedora-all]
CVE-2020-8616 bind: BIND does not sufficiently limit the number of fetches performed when processing referrals [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE:
Bugzilla
CVE-2020-8616 bind: BIND does not sufficiently limit the number of fetches performed when processing referrals
bugzilla·2020-05-15·CVSS 8.6
CVE-2020-8616 [HIGH] CVE-2020-8616 bind: BIND does not sufficiently limit the number of fetches performed when processing referrals
CVE-2020-8616 bind: BIND does not sufficiently limit the number of fetches performed when processing referrals
As per upstream advisory:
In order for a server performing recursion to locate records in the DNS graph it must be capable of processing referrals, such as those received when it attempts to query an authoritative server for a record which is delegated elsewhere. In its original design BIND (as well as other nameservers) does not sufficiently limit the number of fetches which may be performed while processing a referral response.
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals,cause a recursing server to issue a very large number of fet
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlhttp://www.nxnsattack.comhttp://www.openwall.com/lists/oss-security/2020/05/19/4https://kb.isc.org/docs/cve-2020-8616https://lists.debian.org/debian-lts-announce/2020/05/msg00031.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/https://security.netapp.com/advisory/ntap-20200522-0002/https://usn.ubuntu.com/4365-1/https://usn.ubuntu.com/4365-2/https://www.debian.org/security/2020/dsa-4689https://www.synology.com/security/advisory/Synology_SA_20_12http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlhttp://www.nxnsattack.comhttp://www.openwall.com/lists/oss-security/2020/05/19/4https://kb.isc.org/docs/cve-2020-8616https://lists.debian.org/debian-lts-announce/2020/05/msg00031.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/https://security.netapp.com/advisory/ntap-20200522-0002/https://usn.ubuntu.com/4365-1/https://usn.ubuntu.com/4365-2/https://www.debian.org/security/2020/dsa-4689https://www.synology.com/security/advisory/Synology_SA_20_12
2020-05-19
Published