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| From: | Thomas Deutschmann <whissi@g.o> |
|---|---|
| To: | gentoo-announce@l.g.o |
| Subject: | [gentoo-announce] [ GLSA 202105-01 ] Exim: Multiple vulnerabilities |
| Date: | Tue, 04 May 2021 19:33:23 |
| Message-Id: | 614740db-4424-d486-de01-dc41ad82ad19@gentoo.org |
| 1 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 2 | Gentoo Linux Security Advisory GLSA 202105-01 |
| 3 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 4 | https://security.gentoo.org/ |
| 5 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 6 | |
| 7 | Severity: High |
| 8 | Title: Exim: Multiple vulnerabilities |
| 9 | Date: May 04, 2021 |
| 10 | Bugs: #786945 |
| 11 | ID: 202105-01 |
| 12 | |
| 13 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 14 | |
| 15 | Synopsis |
| 16 | ======== |
| 17 | |
| 18 | Multiple vulnerabilities have been found in Exim, the worst of which |
| 19 | allows remote attackers to execute arbitrary code. |
| 20 | |
| 21 | Background |
| 22 | ========== |
| 23 | |
| 24 | Exim is a message transfer agent (MTA) designed to be a a highly |
| 25 | configurable, drop-in replacement for sendmail. |
| 26 | |
| 27 | Affected packages |
| 28 | ================= |
| 29 | |
| 30 | ------------------------------------------------------------------- |
| 31 | Package / Vulnerable / Unaffected |
| 32 | ------------------------------------------------------------------- |
| 33 | 1 mail-mta/exim < 4.94.2 >= 4.94.2 |
| 34 | |
| 35 | Description |
| 36 | =========== |
| 37 | |
| 38 | Multiple vulnerabilities have been discovered in Exim. Please review |
| 39 | the CVE identifiers referenced below for details. |
| 40 | |
| 41 | Impact |
| 42 | ====== |
| 43 | |
| 44 | A remote attacker, by connecting to the SMTP listener daemon, could |
| 45 | possibly execute arbitrary code with the privileges of the process or |
| 46 | cause a Denial of Service condition. Furthermore, a local attacker |
| 47 | could perform symlink attacks to overwrite arbitrary files with the |
| 48 | privileges of the user running the application or escalate privileges. |
| 49 | |
| 50 | Workaround |
| 51 | ========== |
| 52 | |
| 53 | There is no known workaround at this time. |
| 54 | |
| 55 | Resolution |
| 56 | ========== |
| 57 | |
| 58 | All Exim users should upgrade to the latest version: |
| 59 | |
| 60 | # emerge --sync |
| 61 | # emerge --ask --oneshot --verbose ">=mail-mta/exim-4.94.2" |
| 62 | |
| 63 | References |
| 64 | ========== |
| 65 | |
| 66 | [ 1 ] CVE-2020-28007 |
| 67 | https://nvd.nist.gov/vuln/detail/CVE-2020-28007 |
| 68 | [ 2 ] CVE-2020-28008 |
| 69 | https://nvd.nist.gov/vuln/detail/CVE-2020-28008 |
| 70 | [ 3 ] CVE-2020-28009 |
| 71 | https://nvd.nist.gov/vuln/detail/CVE-2020-28009 |
| 72 | [ 4 ] CVE-2020-28010 |
| 73 | https://nvd.nist.gov/vuln/detail/CVE-2020-28010 |
| 74 | [ 5 ] CVE-2020-28011 |
| 75 | https://nvd.nist.gov/vuln/detail/CVE-2020-28011 |
| 76 | [ 6 ] CVE-2020-28012 |
| 77 | https://nvd.nist.gov/vuln/detail/CVE-2020-28012 |
| 78 | [ 7 ] CVE-2020-28013 |
| 79 | https://nvd.nist.gov/vuln/detail/CVE-2020-28013 |
| 80 | [ 8 ] CVE-2020-28014 |
| 81 | https://nvd.nist.gov/vuln/detail/CVE-2020-28014 |
| 82 | [ 9 ] CVE-2020-28015 |
| 83 | https://nvd.nist.gov/vuln/detail/CVE-2020-28015 |
| 84 | [ 10 ] CVE-2020-28016 |
| 85 | https://nvd.nist.gov/vuln/detail/CVE-2020-28016 |
| 86 | [ 11 ] CVE-2020-28017 |
| 87 | https://nvd.nist.gov/vuln/detail/CVE-2020-28017 |
| 88 | [ 12 ] CVE-2020-28018 |
| 89 | https://nvd.nist.gov/vuln/detail/CVE-2020-28018 |
| 90 | [ 13 ] CVE-2020-28019 |
| 91 | https://nvd.nist.gov/vuln/detail/CVE-2020-28019 |
| 92 | [ 14 ] CVE-2020-28020 |
| 93 | https://nvd.nist.gov/vuln/detail/CVE-2020-28020 |
| 94 | [ 15 ] CVE-2020-28021 |
| 95 | https://nvd.nist.gov/vuln/detail/CVE-2020-28021 |
| 96 | [ 16 ] CVE-2020-28022 |
| 97 | https://nvd.nist.gov/vuln/detail/CVE-2020-28022 |
| 98 | [ 17 ] CVE-2020-28023 |
| 99 | https://nvd.nist.gov/vuln/detail/CVE-2020-28023 |
| 100 | [ 18 ] CVE-2020-28024 |
| 101 | https://nvd.nist.gov/vuln/detail/CVE-2020-28024 |
| 102 | [ 19 ] CVE-2020-28025 |
| 103 | https://nvd.nist.gov/vuln/detail/CVE-2020-28025 |
| 104 | [ 20 ] CVE-2020-28026 |
| 105 | https://nvd.nist.gov/vuln/detail/CVE-2020-28026 |
| 106 | [ 21 ] CVE-2021-27216 |
| 107 | https://nvd.nist.gov/vuln/detail/CVE-2021-27216 |
| 108 | |
| 109 | Availability |
| 110 | ============ |
| 111 | |
| 112 | This GLSA and any updates to it are available for viewing at |
| 113 | the Gentoo Security Website: |
| 114 | |
| 115 | https://security.gentoo.org/glsa/202105-01 |
| 116 | |
| 117 | Concerns? |
| 118 | ========= |
| 119 | |
| 120 | Security is a primary focus of Gentoo Linux and ensuring the |
| 121 | confidentiality and security of our users' machines is of utmost |
| 122 | importance to us. Any security concerns should be addressed to |
| 123 | security@g.o or alternatively, you may file a bug at |
| 124 | https://bugs.gentoo.org. |
| 125 | |
| 126 | License |
| 127 | ======= |
| 128 | |
| 129 | Copyright 2021 Gentoo Foundation, Inc; referenced text |
| 130 | belongs to its owner(s). |
| 131 | |
| 132 | The contents of this document are licensed under the |
| 133 | Creative Commons - Attribution / Share Alike license. |
| 134 | |
| 135 | https://creativecommons.org/licenses/by-sa/2.5 |
| File name | MIME type |
|---|---|
| OpenPGP_signature.asc | application/pgp-signature |