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| From: | Aaron Bauman <bman@g.o> |
|---|---|
| To: | gentoo-announce@l.g.o |
| Subject: | [gentoo-announce] [ GLSA 202101-17 ] Dnsmasq: Multiple vulnerabilities |
| Date: | Fri, 22 Jan 2021 18:00:46 |
| Message-Id: | YAsRyBrsuSLQjjAH@samurai |
| 1 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 2 | Gentoo Linux Security Advisory GLSA 202101-17 |
| 3 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 4 | https://security.gentoo.org/ |
| 5 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 | |
| 7 | Severity: Normal |
| 8 | Title: Dnsmasq: Multiple vulnerabilities |
| 9 | Date: January 22, 2021 |
| 10 | Bugs: #766126 |
| 11 | ID: 202101-17 |
| 12 | |
| 13 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 14 | |
| 15 | Synopsis |
| 16 | ======== |
| 17 | |
| 18 | Multiple vulnerabilities have been found in Dnsmasq, the worst of which |
| 19 | may allow remote attackers to execute arbitrary code. |
| 20 | |
| 21 | Background |
| 22 | ========== |
| 23 | |
| 24 | Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP |
| 25 | server. |
| 26 | |
| 27 | Affected packages |
| 28 | ================= |
| 29 | |
| 30 | ------------------------------------------------------------------- |
| 31 | Package / Vulnerable / Unaffected |
| 32 | ------------------------------------------------------------------- |
| 33 | 1 net-dns/dnsmasq < 2.83 >= 2.83 |
| 34 | |
| 35 | Description |
| 36 | =========== |
| 37 | |
| 38 | Multiple vulnerabilities have been discovered in Dnsmasq. Please review |
| 39 | the references below for details. |
| 40 | |
| 41 | Impact |
| 42 | ====== |
| 43 | |
| 44 | An attacker, by sending specially crafted DNS replies, could possibly |
| 45 | execute arbitrary code with the privileges of the process, perform a |
| 46 | cache poisoning attack or cause a Denial of Service condition. |
| 47 | |
| 48 | Workaround |
| 49 | ========== |
| 50 | |
| 51 | There is no known workaround at this time. |
| 52 | |
| 53 | Resolution |
| 54 | ========== |
| 55 | |
| 56 | All Dnsmasq users should upgrade to the latest version: |
| 57 | |
| 58 | # emerge --sync |
| 59 | # emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.83" |
| 60 | |
| 61 | References |
| 62 | ========== |
| 63 | |
| 64 | [ 1 ] CVE-2020-25681 |
| 65 | https://nvd.nist.gov/vuln/detail/CVE-2020-25681 |
| 66 | [ 2 ] CVE-2020-25682 |
| 67 | https://nvd.nist.gov/vuln/detail/CVE-2020-25682 |
| 68 | [ 3 ] CVE-2020-25683 |
| 69 | https://nvd.nist.gov/vuln/detail/CVE-2020-25683 |
| 70 | [ 4 ] CVE-2020-25684 |
| 71 | https://nvd.nist.gov/vuln/detail/CVE-2020-25684 |
| 72 | [ 5 ] CVE-2020-25685 |
| 73 | https://nvd.nist.gov/vuln/detail/CVE-2020-25685 |
| 74 | [ 6 ] CVE-2020-25686 |
| 75 | https://nvd.nist.gov/vuln/detail/CVE-2020-25686 |
| 76 | [ 7 ] CVE-2020-25687 |
| 77 | https://nvd.nist.gov/vuln/detail/CVE-2020-25687 |
| 78 | |
| 79 | Availability |
| 80 | ============ |
| 81 | |
| 82 | This GLSA and any updates to it are available for viewing at |
| 83 | the Gentoo Security Website: |
| 84 | |
| 85 | https://security.gentoo.org/glsa/202101-17 |
| 86 | |
| 87 | Concerns? |
| 88 | ========= |
| 89 | |
| 90 | Security is a primary focus of Gentoo Linux and ensuring the |
| 91 | confidentiality and security of our users' machines is of utmost |
| 92 | importance to us. Any security concerns should be addressed to |
| 93 | security@g.o or alternatively, you may file a bug at |
| 94 | https://bugs.gentoo.org. |
| 95 | |
| 96 | License |
| 97 | ======= |
| 98 | |
| 99 | Copyright 2021 Gentoo Foundation, Inc; referenced text |
| 100 | belongs to its owner(s). |
| 101 | |
| 102 | The contents of this document are licensed under the |
| 103 | Creative Commons - Attribution / Share Alike license. |
| 104 | |
| 105 | https://creativecommons.org/licenses/by-sa/2.5 |
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