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Vulnerability details: VCID-u8sg-wg5a-9kf7
Vulnerability ID VCID-u8sg-wg5a-9kf7
Aliases CVE-2023-5981
Summary A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.
Status Published
Exploitability 0.5
Weighted Severity 5.3
Risk 2.6
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-1300 Improper Protection of Physical Side Channels
CWE-203 Observable Discrepancy
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-5981.json
epss 0.00482 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
epss 0.00561 https://api.first.org/data/v1/epss?cve=CVE-2023-5981
cvssv3.1 5.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2023-5981
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-5981.json
https://access.redhat.com/security/cve/CVE-2023-5981
https://api.first.org/data/v1/epss?cve=CVE-2023-5981
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5981
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://gnutls.org/security-new.html#GNUTLS-SA-2023-10-23
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7ZEIOLORQ7N6WRPFXZSYDL2MC4LP7VFV/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNXKVR5YNUEBNHAHM5GSYKBZX4W2HMN2/
http://www.openwall.com/lists/oss-security/2024/01/19/3
1056188 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056188
2248445 https://bugzilla.redhat.com/show_bug.cgi?id=2248445
cpe:2.3:a:gnu:gnutls:1.5.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:gnu:gnutls:1.5.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:linux:9.0:*:*:*:*:*:*:*
CVE-2023-5981 https://nvd.nist.gov/vuln/detail/CVE-2023-5981
RHSA-2024:0155 https://access.redhat.com/errata/RHSA-2024:0155
RHSA-2024:0319 https://access.redhat.com/errata/RHSA-2024:0319
RHSA-2024:0399 https://access.redhat.com/errata/RHSA-2024:0399
RHSA-2024:0451 https://access.redhat.com/errata/RHSA-2024:0451
RHSA-2024:0533 https://access.redhat.com/errata/RHSA-2024:0533
RHSA-2024:1383 https://access.redhat.com/errata/RHSA-2024:1383
RHSA-2024:2094 https://access.redhat.com/errata/RHSA-2024:2094
USN-6499-1 https://usn.ubuntu.com/6499-1/
USN-6499-2 https://usn.ubuntu.com/6499-2/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-5981.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:H/PR:N/UI:N/S:U/C:H/I:N/A:N 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: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-5981
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 0.64194
EPSS Score 0.00482
Published At Aug. 16, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:40:05.756754+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/6499-1/ 37.0.0