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Vulnerability details: VCID-1b1d-tj5f-aaaj
Vulnerability ID VCID-1b1d-tj5f-aaaj
Aliases CVE-2021-20277
Summary A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-787 Out-of-bounds Write
CWE-125 Out-of-bounds Read
System Score Found at
generic_textual High http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-20277.html
rhas Important https://access.redhat.com/errata/RHSA-2021:1072
rhas Important https://access.redhat.com/errata/RHSA-2021:1197
rhas Important https://access.redhat.com/errata/RHSA-2021:1213
rhas Important https://access.redhat.com/errata/RHSA-2021:1214
rhas Important https://access.redhat.com/errata/RHSA-2021:2331
rhas Important https://access.redhat.com/errata/RHSA-2021:2786
cvssv3 7.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20277.json
epss 0.00611 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00611 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00611 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00611 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00630 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00630 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00630 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00630 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.00630 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
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epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
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epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
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epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
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epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
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epss 0.06561 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.11749 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.11749 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.11749 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.11749 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.11749 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.11749 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.12602 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
epss 0.23281 https://api.first.org/data/v1/epss?cve=CVE-2021-20277
rhbs high https://bugzilla.redhat.com/show_bug.cgi?id=1941402
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10730
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27840
generic_textual High https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20277
cvssv3.1 7.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2021-20277
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-20277
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-20277
archlinux Medium https://security.archlinux.org/AVG-1732
archlinux Medium https://security.archlinux.org/AVG-1734
generic_textual High https://ubuntu.com/security/notices/USN-4888-1
generic_textual High https://ubuntu.com/security/notices/USN-4888-2
generic_textual High https://www.samba.org/samba/security/CVE-2021-20277.html
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-20277.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20277.json
https://api.first.org/data/v1/epss?cve=CVE-2021-20277
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10730
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27840
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20277
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/
https://security.gentoo.org/glsa/202105-22
https://security.netapp.com/advisory/ntap-20210326-0007/
https://ubuntu.com/security/notices/USN-4888-1
https://ubuntu.com/security/notices/USN-4888-2
https://www.debian.org/security/2021/dsa-4884
https://www.samba.org/samba/security/CVE-2021-20277.html
1941402 https://bugzilla.redhat.com/show_bug.cgi?id=1941402
985935 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985935
AVG-1732 https://security.archlinux.org/AVG-1732
AVG-1734 https://security.archlinux.org/AVG-1734
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-20277 https://nvd.nist.gov/vuln/detail/CVE-2021-20277
RHSA-2021:1072 https://access.redhat.com/errata/RHSA-2021:1072
RHSA-2021:1197 https://access.redhat.com/errata/RHSA-2021:1197
RHSA-2021:1213 https://access.redhat.com/errata/RHSA-2021:1213
RHSA-2021:1214 https://access.redhat.com/errata/RHSA-2021:1214
RHSA-2021:2331 https://access.redhat.com/errata/RHSA-2021:2331
RHSA-2021:2786 https://access.redhat.com/errata/RHSA-2021:2786
USN-4888-1 https://usn.ubuntu.com/4888-1/
USN-4888-2 https://usn.ubuntu.com/4888-2/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-20277.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20277
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20277
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-20277
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.78488
EPSS Score 0.00611
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.