CVE-2024-0553 | Gnutls: incomplete fix for cve-2023-5981

Exp

A vulnerability was found in GnuTLS. The response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from the response times of ciphertexts with correct PKCS#1 v1.5 padding. This issue may allow a remote attacker to perform a timing side-channel attack in the RSA-PSK key exchange, potentially leading to the leakage of sensitive data. CVE-2024-0553 is designated as an incomplete resolution for CVE-2023-5981.

Published: 2024-01-16 Last update: 2026-03-24 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-0553 is rated High Exploit Risk (72.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.03%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2024-0553

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-0553

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 2026-05-22 0.95% 1.03% +0.08%
2 2026-04-19 1.03% 0.95% -0.08%
3 2026-03-24 — 1.03% —

Full EPSS history (29 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-0553

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-0553

OS Trackers for CVE-2024-0553

vendor priority summary link
alpine — CVE-2024-0553: 1 source package rows (gnutls); 47 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 6, open 41. https://security.alpinelinux.org/vuln/CVE-2024-0553
debian not yet assigned CVE-2024-0553 not yet assigned priority: Debian including 1 source packages (gnutls28), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-0553
gentoo normal CVE-2024-0553: 1 GLSA(s) (202411-06), 1 atom(s) (net-libs/gnutls); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2024-0553
redhat medium — https://access.redhat.com/security/cve/CVE-2024-0553
suse medium CVE-2024-0553 severity moderate: SUSE including 309 source package names (15.2.9.5.419:libgnutls30-3.6.7-150200.14.31.1, 15.2.9.5.419:libgnutls30-hmac-3.6.7-150200.14.31.1, …), 674 product×package rows across 205 product lines (Container bci/php, Container bci/php-apache, … (205 product lines)): Fixed 434, Known Affected 195, Will Not Fix 31, Known Not Affected 14. https://www.suse.com/security/cve/CVE-2024-0553/
ubuntu medium CVE-2024-0553 medium priority: Ubuntu including 1 source packages (gnutls28), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 9, ignored 2, needs-triage 1. https://ubuntu.com/security/CVE-2024-0553

Affected software / configurations for CVE-2024-0553

Vendor Product Version Raw CPE
gnu gnutls < 3.8.3 cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*
fedoraproject fedora 39 cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
redhat enterprise_linux 9.0 cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

References for CVE-2024-0553

URL Tags
https://access.redhat.com/errata/RHSA-2024:0533
https://access.redhat.com/errata/RHSA-2024:0627
https://access.redhat.com/errata/RHSA-2024:0796
https://access.redhat.com/errata/RHSA-2024:1082
https://access.redhat.com/errata/RHSA-2024:1108
https://access.redhat.com/errata/RHSA-2024:1383
https://access.redhat.com/errata/RHSA-2024:2094
https://access.redhat.com/security/cve/CVE-2024-0553 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2258412 Issue Tracking Third Party Advisory
https://gitlab.com/gnutls/gnutls/-/issues/1522 Exploit Issue Tracking Vendor Advisory
https://lists.gnupg.org/pipermail/gnutls-help/2024-January/004841.html Mailing List
http://www.openwall.com/lists/oss-security/2024/01/19/3
https://lists.debian.org/debian-lts-announce/2024/02/msg00010.html
https://lists.fedoraproject.org/archives/list/[email protected]/message/7ZEIOLORQ7N6WRPFXZSYDL2MC4LP7VFV/
https://lists.fedoraproject.org/archives/list/[email protected]/message/GNXKVR5YNUEBNHAHM5GSYKBZX4W2HMN2/
https://security.netapp.com/advisory/ntap-20240202-0011/
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