Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2023-5388

Observable Discrepancy

Published: Mar 19, 2024 | Modified: Nov 04, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
6.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2023-5388
CWEhttps://cwe.mitre.org/data/definitions/203.html

NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow an attacker to recover the private data. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.

Weakness

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Affected Software

NameVendorStart VersionEnd Version
FirefoxMozilla*115.9.0 (excluding)
FirefoxMozilla*124.0 (excluding)
ThunderbirdMozilla*115.9.0 (excluding)
Red Hat Enterprise Linux 7RedHatfirefox-0:115.9.1-1.el7_9*
Red Hat Enterprise Linux 7RedHatthunderbird-0:115.9.0-1.el7_9*
Red Hat Enterprise Linux 8RedHatnss-0:3.90.0-4.el8_9*
Red Hat Enterprise Linux 8RedHatfirefox-0:115.9.1-1.el8_9*
Red Hat Enterprise Linux 8RedHatthunderbird-0:115.9.0-1.el8_9*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatfirefox-0:115.9.1-1.el8_2*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatthunderbird-0:115.9.0-1.el8_2*
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRedHatfirefox-0:115.9.1-1.el8_2*
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRedHatthunderbird-0:115.9.0-1.el8_2*
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRedHatfirefox-0:115.9.1-1.el8_2*
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRedHatthunderbird-0:115.9.0-1.el8_2*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatfirefox-0:115.9.1-1.el8_4*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatthunderbird-0:115.9.0-1.el8_4*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHatfirefox-0:115.9.1-1.el8_4*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHatthunderbird-0:115.9.0-1.el8_4*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHatfirefox-0:115.9.1-1.el8_4*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHatthunderbird-0:115.9.0-1.el8_4*
Red Hat Enterprise Linux 8.6 Extended Update SupportRedHatnss-0:3.79.0-12.el8_6*
Red Hat Enterprise Linux 8.6 Extended Update SupportRedHatfirefox-0:115.9.1-1.el8_6*
Red Hat Enterprise Linux 8.6 Extended Update SupportRedHatthunderbird-0:115.9.0-1.el8_6*
Red Hat Enterprise Linux 8.8 Extended Update SupportRedHatnss-0:3.90.0-4.el8_8*
Red Hat Enterprise Linux 8.8 Extended Update SupportRedHatfirefox-0:115.9.1-1.el8_8*
Red Hat Enterprise Linux 8.8 Extended Update SupportRedHatthunderbird-0:115.9.0-1.el8_8*
Red Hat Enterprise Linux 9RedHatnss-0:3.90.0-4.el9_3*
Red Hat Enterprise Linux 9RedHatfirefox-0:115.9.1-1.el9_3*
Red Hat Enterprise Linux 9RedHatthunderbird-0:115.9.0-1.el9_3*
Red Hat Enterprise Linux 9.0 Extended Update SupportRedHatfirefox-0:115.9.1-1.el9_0*
Red Hat Enterprise Linux 9.0 Extended Update SupportRedHatthunderbird-0:115.9.0-1.el9_0*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHatnss-0:3.90.0-4.el9_2*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHatfirefox-0:115.9.1-1.el9_2*
Red Hat Enterprise Linux 9.2 Extended Update SupportRedHatthunderbird-0:115.9.0-1.el9_2*
FirefoxUbuntufocal*
Mozjs102Ubuntuesm-apps/noble*
Mozjs102Ubuntujammy*
Mozjs102Ubuntumantic*
Mozjs102Ubuntunoble*
Mozjs102Ubuntuupstream*
Mozjs38Ubuntuesm-apps/bionic*
Mozjs38Ubuntuupstream*
Mozjs52Ubuntuesm-apps/focal*
Mozjs52Ubuntuesm-infra/bionic*
Mozjs52Ubuntufocal*
Mozjs52Ubuntuupstream*
Mozjs68Ubuntuesm-infra/focal*
Mozjs68Ubuntufocal*
Mozjs68Ubuntuupstream*
Mozjs78Ubuntuesm-apps/jammy*
Mozjs78Ubuntujammy*
Mozjs78Ubuntuupstream*
Mozjs91Ubuntujammy*
Mozjs91Ubuntuupstream*
NssUbuntubionic*
NssUbuntuesm-infra-legacy/trusty*
NssUbuntuesm-infra/bionic*
NssUbuntuesm-infra/focal*
NssUbuntuesm-infra/xenial*
NssUbuntufocal*
NssUbuntujammy*
NssUbuntulunar*
NssUbuntumantic*
NssUbuntutrusty*
NssUbuntutrusty/esm*
NssUbuntuupstream*
NssUbuntuxenial*
ThunderbirdUbuntufocal*
ThunderbirdUbuntujammy*
ThunderbirdUbuntumantic*

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
  • Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
  • If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
  • Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.

References

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