VulnerabilityPublished 20 Jan 2025Updated 9 Nov 2026

CVE-2024-13176: Issue summary · A timing side-channel which could potentially allow recovering the private key exists

Affects opensslSource GCVE Database

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Authoritative record:CVE-2024-13176· Medium 4.6

Not known to be exploited · CVSS 4.6 Medium · fixed in 1.1.1f-1ubuntu2.24 : update openssl when convenient.

Data as of 9 Nov 2026, 14:36 UTC

CVSS 3.1 base score

4.6Medium

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CISA-ADP	CVSS 3.1	4.6

Patch: Available – fixed in 1.1.1f-1ubuntu2.24, 1.1.1f-1ubuntu2.fips.24, 2022.02-3ubuntu0.22.04.4 +6

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Physical
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Physical: The attack requires the attacker to physically touch or manipulate the vulnerable component. Physical interaction may be brief or persistent.
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Jan 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Patches and advisories

Affected software

Product	Affected	Fixed in
Ubuntu 26.04 LTSedk2`pkg:deb/ubuntu/edk2?arch=source&distro=resolute`Other threats	Affected <2025.02-8ubuntu3	Fixed in 2025.02-8ubuntu3
Ubuntu 25.10edk2`pkg:deb/ubuntu/edk2?arch=source&distro=questing`Other threats	Affected <2025.02-8ubuntu3	Fixed in 2025.02-8ubuntu3
Ubuntu 24.04 LTSedk2`pkg:deb/ubuntu/edk2?arch=source&distro=noble`Other threats	Affected <2024.02-2ubuntu0.6	Fixed in 2024.02-2ubuntu0.6
Ubuntu 24.04 LTSopenssl`pkg:deb/ubuntu/openssl?arch=source&distro=noble`Other threats	Affected <3.0.13-0ubuntu3.5	Fixed in 3.0.13-0ubuntu3.5
Ubuntu Pro FIPS-updates 24.04 LTSopenssl-fips`pkg:deb/ubuntu/openssl-fips?arch=source&distro=fips-updates/noble`Other threats	Affected <3.0.13-0ubuntu3.6+Fips1 =3.0.13-0ubuntu3+Fips1	Fixed in 3.0.13-0ubuntu3.6+Fips1
Ubuntu 22.04 LTSedk2`pkg:deb/ubuntu/edk2?arch=source&distro=jammy`Other threats	Affected <2022.02-3ubuntu0.22.04.4 =2022.02~rc1-1 =2022.02~rc1-1ubuntu1	Fixed in 2022.02-3ubuntu0.22.04.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and has been released in multiple Ubuntu OpenSSL package versions, including 1.1.1f-1ubuntu2.24, 3.0.2-0ubuntu1.19, and their FIPS variants. Users should apply the official security updates from Ubuntu security notices USN-7264-1, USN-7278-1, and USN-7894-1 and reboot their systems to complete remediation. No additional mitigation actions are required beyond applying these patches.

Description

A timing side-channel vulnerability exists in OpenSSL's ECDSA signature computation, specifically affecting the NIST P-521 elliptic curve. This side-channel could potentially allow an attacker with local access or a very low-latency network connection to recover the private key by measuring timing differences of around 300 nanoseconds. The affected OpenSSL versions include various Ubuntu package versions prior to fixed releases. The severity is rated as medium with a CVSS score of 4.6. Official patches addressing this issue are available in multiple Ubuntu OpenSSL package versions.

Impact

The vulnerability could allow an attacker to recover the private key used in ECDSA signatures by exploiting a timing side-channel. However, the attack feasibility is limited due to the requirement for local access or a very fast, low-latency network connection. The impact is confidentiality loss (private key compromise) without integrity or availability impact. The vulnerability affects cryptographic security of ECDSA signatures using the NIST P-521 curve in affected OpenSSL versions.

GCVE source: db.gcve.eu
OSV ID: UBUNTU-CVE-2024-13176
Osv Schema Version: 1.7.0
Ecosystems: Ubuntu:Pro:14.04:LTS, Ubuntu:Pro:16.04:LTS, Ubuntu:Pro:FIPS-updates:16.04:LTS, Ubuntu:Pro:FIPS:16.04:LTS, Ubuntu:Pro:18.04:LTS, Ubuntu:Pro:FIPS-updates:18.04:LTS, Ubuntu:Pro:FIPS:18.04:LTS, Ubuntu:20.04:LTS, Ubuntu:Pro:20.04:LTS, Ubuntu:Pro:FIPS-updates:20.04:LTS, Ubuntu:Pro:FIPS:20.04:LTS, Ubuntu:22.04:LTS, Ubuntu:Pro:22.04:LTS, Ubuntu:Pro:FIPS-preview:22.04:LTS, Ubuntu:Pro:FIPS-updates:22.04:LTS, Ubuntu:24.04:LTS, Ubuntu:Pro:FIPS-updates:24.04:LTS, Ubuntu:25.10, Ubuntu:26.04:LTS
CVSS version: 3.1

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Exploitation evidence

What to do

Patches and advisories

Affected software

Description

AI analysisMachine-generated, updated 9 Nov 2026, 14:36 UTC

Public exploits and detectionGitHub proofs of concept

Technical details

References

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