synced 10 MIN AGO
01 Record

CVE-2023-5388

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 <

MediumPUBLISHEDCNA: mozilla
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
View raw JSON

02 Description

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 <

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.97% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 61.9% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-03-19 12:02Z2 YR AGO
Last updated
2025-11-04 18:21Z11 MO AGO
Reserved
2023-10-04
Assigning CNA
mozilla
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weaknesses
  • CWE-203Observable DiscrepancyBase
  • CWE-208Observable Timing DiscrepancyBase
Data version
5.2
Document digest
68da47ec988e27045eedaa47f0df1baccbe6fb91def1123bdd3d93bccd9059e1

05 Affected products

VendorProductVersionsPlatforms
MozillaFirefox< 124—
MozillaFirefox ESR< 115.9—
MozillaThunderbird< 115.9—

06 References

07 Fixed in

AlmaLinux 8

  • firefox
    Fixed in 115.9.1-1.el8_9.alma.1
  • nss
    Fixed in 3.90.0-4.el8_9
  • nss-devel
    Fixed in 3.90.0-4.el8_9
  • nss-softokn
    Fixed in 3.90.0-4.el8_9
  • nss-softokn-devel
    Fixed in 3.90.0-4.el8_9
  • nss-softokn-freebl
    Fixed in 3.90.0-4.el8_9
  • nss-softokn-freebl-devel
    Fixed in 3.90.0-4.el8_9
  • nss-sysinit
    Fixed in 3.90.0-4.el8_9
  • nss-tools
    Fixed in 3.90.0-4.el8_9
  • nss-util
    Fixed in 3.90.0-4.el8_9
  • nss-util-devel
    Fixed in 3.90.0-4.el8_9
  • thunderbird
    Fixed in 115.9.0-1.el8_9.alma.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • firefox
    Fixed in 115.9.1-1.el9_3.alma.1
  • firefox-x11
    Fixed in 115.9.1-1.el9_3.alma.1
  • nspr
    Fixed in 4.35.0-4.el9_3
  • nspr-devel
    Fixed in 4.35.0-4.el9_3
  • nss
    Fixed in 3.90.0-4.el9_3
  • nss-devel
    Fixed in 3.90.0-4.el9_3
  • nss-softokn
    Fixed in 3.90.0-4.el9_3
  • nss-softokn-devel
    Fixed in 3.90.0-4.el9_3
  • nss-softokn-freebl
    Fixed in 3.90.0-4.el9_3
  • nss-softokn-freebl-devel
    Fixed in 3.90.0-4.el9_3
  • nss-sysinit
    Fixed in 3.90.0-4.el9_3
  • nss-tools
    Fixed in 3.90.0-4.el9_3
  • nss-util
    Fixed in 3.90.0-4.el9_3
  • nss-util-devel
    Fixed in 3.90.0-4.el9_3
  • thunderbird
    Fixed in 115.9.0-1.el9_3.alma.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • firefox
    Fixed in 115.9.1-1.el8_9.alma.1
  • nss
    Fixed in 3.90.0-4.el8_9
  • nss-devel
    Fixed in 3.90.0-4.el8_9
  • nss-softokn
    Fixed in 3.90.0-4.el8_9
  • nss-softokn-devel
    Fixed in 3.90.0-4.el8_9
  • nss-softokn-freebl
    Fixed in 3.90.0-4.el8_9
  • nss-softokn-freebl-devel
    Fixed in 3.90.0-4.el8_9
  • nss-sysinit
    Fixed in 3.90.0-4.el8_9
  • nss-tools
    Fixed in 3.90.0-4.el8_9
  • nss-util
    Fixed in 3.90.0-4.el8_9
  • nss-util-devel
    Fixed in 3.90.0-4.el8_9
  • thunderbird
    Fixed in 115.9.0-1.el8_9.alma.1

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • firefox
    Fixed in 115.9.1-1.el9_3.alma.1
  • firefox-x11
    Fixed in 115.9.1-1.el9_3.alma.1
  • nspr
    Fixed in 4.35.0-4.el9_3
  • nspr-devel
    Fixed in 4.35.0-4.el9_3
  • nss
    Fixed in 3.90.0-4.el9_3
  • nss-devel
    Fixed in 3.90.0-4.el9_3
  • nss-softokn
    Fixed in 3.90.0-4.el9_3
  • nss-softokn-devel
    Fixed in 3.90.0-4.el9_3
  • nss-softokn-freebl
    Fixed in 3.90.0-4.el9_3
  • nss-softokn-freebl-devel
    Fixed in 3.90.0-4.el9_3
  • nss-sysinit
    Fixed in 3.90.0-4.el9_3
  • nss-tools
    Fixed in 3.90.0-4.el9_3
  • nss-util
    Fixed in 3.90.0-4.el9_3
  • nss-util-devel
    Fixed in 3.90.0-4.el9_3
  • thunderbird
    Fixed in 115.9.0-1.el9_3.alma.1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • firefox-esr
    Fixed in 115.9.0esr-1~deb12u1
  • nss
    No fix yet
  • thunderbird
    Fixed in 1:115.9.0-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • firefox-esr
    Fixed in 115.9.0esr-1
  • nss
    Fixed in 2:3.98-1
  • thunderbird
    Fixed in 1:115.9.0-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • firefox-esr
    Fixed in 115.9.0esr-1
  • nss
    Fixed in 2:3.98-1
  • thunderbird
    Fixed in 1:115.9.0-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • mozjs38
    No fix yet
  • mozjs52
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • firefox
    Fixed in 124.0+build1-0ubuntu0.20.04.1
  • mozjs52
    No fix yet
  • mozjs68
    No fix yet
  • nss
    Fixed in 2:3.98-0ubuntu0.20.04.1
  • thunderbird
    Fixed in 1:115.9.0+build1-0ubuntu0.20.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • mozjs102
    No fix yet
  • mozjs78
    No fix yet
  • mozjs91
    No fix yet
  • nss
    Fixed in 2:3.98-0ubuntu0.22.04.1
  • thunderbird
    Fixed in 1:115.9.0+build1-0ubuntu0.22.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • mozjs102
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • nss
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • nss
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • nss
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.