CVE-2024-39312 | Botan has an Authorization Error due to Name Constraint Decoding Bug

Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. A bug in the parsing of name constraint extensions in X.509 certificates meant that if the extension included both permitted subtrees and excluded subtrees, only the permitted subtree would be checked. If a certificate included a name which was permitted by the permitted subtree but also excluded by excluded subtree, it would be accepted. Fixed in versions 3.5.0 and 2.19.5.

Published: 2024-07-08 Last update: 2025-04-11 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-39312 is rated Moderate Risk (40.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.30%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-39312

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.10% 0.30% +0.21%
2 2025-11-18 0.22% 0.10% -0.12%
3 2025-10-19 — 0.22% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-39312

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2024-39312

OS Trackers for CVE-2024-39312

vendor priority summary link
alpine — CVE-2024-39312: 2 source package rows (botan, botan3); 38 state rows across 8 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 10, open 28. https://security.alpinelinux.org/vuln/CVE-2024-39312
debian not yet assigned CVE-2024-39312 not yet assigned priority: Debian including 1 source packages (botan), 3 status rows across 3 suites (bookworm, bullseye, trixie): resolved 2, open 1. https://security-tracker.debian.org/tracker/CVE-2024-39312
suse medium CVE-2024-39312 severity moderate: SUSE including 25 source package names (Botan, Botan-2.19.5-bp155.2.3.1, …), 46 product×package rows across 8 product lines (SUSE Linux Enterprise Server 12 SP5-LTSS, SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security, … (8 product lines)): Fixed 40, Known Not Affected 6. https://www.suse.com/security/cve/CVE-2024-39312/
ubuntu medium CVE-2024-39312 medium priority: Ubuntu including 1 source packages (botan), 9 status rows across 9 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, upstream): released 4, ignored 2, not-affected 2, needed 1. https://ubuntu.com/security/CVE-2024-39312

Affected software / configurations for CVE-2024-39312

Vendor Product Version Raw CPE
botan_project botan < 2.19.5 cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*
botan_project botan >= 3.0.0, < 3.5.0 cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*

References for CVE-2024-39312

cvelogic Threat Intelligence