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Vulnerability details: VCID-cgx4-cn62-9kex
Vulnerability ID VCID-cgx4-cn62-9kex
Aliases CVE-2024-27354
GHSA-hg35-mp25-qf6h
Summary phpseclib a large prime can cause a denial of service An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. An attacker can construct a malformed certificate containing an extremely large prime to cause a denial of service (CPU consumption for an isPrime primality check). NOTE: this issue was introduced when attempting to fix CVE-2023-27560.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00082 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2024-27354
cvssv3.1 7.5 https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
generic_textual HIGH https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
ssvc Track https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
cvssv3.1 7.5 https://github.com/advisories/GHSA-hg35-mp25-qf6h
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-hg35-mp25-qf6h
generic_textual HIGH https://github.com/advisories/GHSA-hg35-mp25-qf6h
cvssv3.1 7.5 https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2024-27354.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2024-27354.yaml
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib
generic_textual HIGH https://github.com/phpseclib/phpseclib
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
generic_textual HIGH https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
ssvc Track https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib/commit/2870c8fab3f132d2ed40a66c97a36fe5ab625698
generic_textual HIGH https://github.com/phpseclib/phpseclib/commit/2870c8fab3f132d2ed40a66c97a36fe5ab625698
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575
generic_textual HIGH https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575
cvssv3.1 7.5 https://github.com/phpseclib/phpseclib/commit/c55b75199ec8d12cec6eadf6da99da4a3712fe56
generic_textual HIGH https://github.com/phpseclib/phpseclib/commit/c55b75199ec8d12cec6eadf6da99da4a3712fe56
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
ssvc Track https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html
ssvc Track https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2024-27354
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2024-27354
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-27354
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27354
https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
https://github.com/advisories/GHSA-hg35-mp25-qf6h
https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2024-27354.yaml
https://github.com/phpseclib/phpseclib
https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
https://github.com/phpseclib/phpseclib/commit/2870c8fab3f132d2ed40a66c97a36fe5ab625698
https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575
https://github.com/phpseclib/phpseclib/commit/c55b75199ec8d12cec6eadf6da99da4a3712fe56
https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html
https://nvd.nist.gov/vuln/detail/CVE-2024-27354
USN-7404-1 https://usn.ubuntu.com/7404-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-03-06T15:59:46Z/ Found at https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/advisories/GHSA-hg35-mp25-qf6h
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2024-27354.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
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

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-03-06T15:59:46Z/ Found at https://github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php#L49
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib/commit/2870c8fab3f132d2ed40a66c97a36fe5ab625698
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/phpseclib/phpseclib/commit/c55b75199ec8d12cec6eadf6da99da4a3712fe56
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
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

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required

unchanged

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high

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none

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none

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-03-06T15:59:46Z/ Found at https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html
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

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required

unchanged

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-03-06T15:59:46Z/ Found at https://lists.debian.org/debian-lts-announce/2024/03/msg00003.html
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-2024-27354
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

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required

unchanged

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Exploit Prediction Scoring System (EPSS)
Percentile 0.24815
EPSS Score 0.00082
Published At Aug. 6, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:33:12.970022+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-hg35-mp25-qf6h/GHSA-hg35-mp25-qf6h.json 37.0.0