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Gentoo Linux Security Advisory GLSA 202012-21 |
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https://security.gentoo.org/ |
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Severity: Low |
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Title: Mozilla Network Security Service (NSS): Denial of service |
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Date: December 23, 2020 |
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Bugs: #750254 |
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ID: 202012-21 |
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Synopsis |
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======== |
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|
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A vulnerability in NSS might allow remote attackers to cause a Denial |
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of Service condition. |
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Background |
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========== |
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|
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The Mozilla Network Security Service (NSS) is a library implementing |
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security features like SSL v.2/v.3, TLS, PKCS #5, PKCS #7, PKCS #11, |
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PKCS #12, S/MIME and X.509 certificates. |
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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 dev-libs/nss < 3.58 >= 3.58 |
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|
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Description |
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=========== |
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|
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A flaw was found in the way Mozilla Network Security Service (NSS) |
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handled CCS (ChangeCipherSpec) messages in TLS 1.3. |
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Impact |
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====== |
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|
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A remote attacker could send multiple crafted CSS messages in row after |
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ClientHello message to a server application linked against NSS library, |
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possibly resulting in a Denial of Service condition. |
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|
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Workaround |
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========== |
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Disable TLS 1.3 protocol. |
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Resolution |
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========== |
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All NSS users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-libs/nss-3.58" |
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|
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References |
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========== |
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[ 1 ] CVE-2020-25648 |
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https://nvd.nist.gov/vuln/detail/CVE-2020-25648 |
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|
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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/202012-21 |
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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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|
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License |
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======= |
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Copyright 2020 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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