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Vulnerability details: VCID-nnwe-q43v-aaaq
Vulnerability ID VCID-nnwe-q43v-aaaq
Aliases CVE-2020-10595
Summary pam-krb5 before 4.9 has a buffer overflow that might cause remote code execution in situations involving supplemental prompting by a Kerberos library. It may overflow a buffer provided by the underlying Kerberos library by a single '\0' byte if an attacker responds to a prompt with an answer of a carefully chosen length. The effect may range from heap corruption to stack corruption depending on the structure of the underlying Kerberos library, with unknown effects but possibly including code execution. This code path is not used for normal authentication, but only when the Kerberos library does supplemental prompting, such as with PKINIT or when using the non-standard no_prompt PAM configuration option.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-20 Improper Input Validation
CWE-122 Heap-based Buffer Overflow
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-10595.html
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-10595.json
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04615 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04615 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04615 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.04615 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.07295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.07295 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
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epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
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epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
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epss 0.08269 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
epss 0.21778 https://api.first.org/data/v1/epss?cve=CVE-2020-10595
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1816536
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10595
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2020-10595
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2020-10595
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2020-10595
archlinux Medium https://security.archlinux.org/AVG-1119
generic_textual Medium https://ubuntu.com/security/notices/USN-4314-1
generic_textual Medium https://usn.ubuntu.com/usn/usn-4314-1
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-10595.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-10595.json
https://api.first.org/data/v1/epss?cve=CVE-2020-10595
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10595
https://github.com/rra/pam-krb5/commit/e7879e27a37119fad4faf133a9f70bdcdc75d760
https://lists.debian.org/debian-lts-announce/2020/04/msg00000.html
https://ubuntu.com/security/notices/USN-4314-1
https://usn.ubuntu.com/4314-1/
https://usn.ubuntu.com/usn/usn-4314-1
https://www.debian.org/security/2020/dsa-4648
https://www.eyrie.org/~eagle/software/pam-krb5/security/2020-03-30.html
http://www.openwall.com/lists/oss-security/2020/03/31/1
1816536 https://bugzilla.redhat.com/show_bug.cgi?id=1816536
ASA-202004-5 https://security.archlinux.org/ASA-202004-5
AVG-1119 https://security.archlinux.org/AVG-1119
cpe:2.3:a:pam-krb5_project:pam-krb5:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:pam-krb5_project:pam-krb5:*:*:*:*:*:*:*:*
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:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
CVE-2020-10595 https://nvd.nist.gov/vuln/detail/CVE-2020-10595
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-10595.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: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2020-10595
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:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-10595
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:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-10595
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 0.92511
EPSS Score 0.04295
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.