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Gentoo Linux Security Advisory GLSA 202101-38 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: NSD: Symbolic link traversal |
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Date: January 29, 2021 |
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Bugs: #758977 |
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ID: 202101-38 |
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Synopsis |
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======== |
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|
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A vulnerability was discovered in NSD which could allow a local |
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attacker to cause a Denial of Service condition. |
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Background |
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========== |
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|
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An authoritative only, high performance, open source name server |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-dns/nsd < 4.3.4 >= 4.3.4 |
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Description |
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=========== |
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|
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A local vulnerability was discovered that would allow for a local |
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symlink attack due to how NSD handles PID files. |
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Impact |
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====== |
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A local attacker could cause a Denial of Service condition. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All NSD users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-dns/nsd-4.3.4" |
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References |
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========== |
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|
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[ 1 ] CVE-2020-28935 |
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https://nvd.nist.gov/vuln/detail/CVE-2020-28935 |
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[ 2 ] Upstream advisory |
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https://www.nlnetlabs.nl/downloads/nsd/CVE-2020-28935.txt |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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https://security.gentoo.org/glsa/202101-38 |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users' machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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https://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2021 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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https://creativecommons.org/licenses/by-sa/2.5 |
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