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CVE-2023-29532

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file...

5.5 MediumFix available

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

0.18%Up 0.1 points since Jun 20, 2023
90%50%10%1%

What each source reports

NVD Score used 5.5

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Record
CVE-2023-29532
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
CVE List 5.5

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Record
CVE-2023-29532
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
EUVDEUVD-2023-33074 5.5

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Record
EUVD-2023-33074
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-f2q9-pfpx-m83g 5.5

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file...

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Record
GHSA-f2q9-pfpx-m83g
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVALPINE-CVE-2023-29532 5.5

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Record
ALPINE-CVE-2023-29532
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-03
OSVOESA-2024-1746 6.5

mozjs78 security update

SpiderMonkey is the code-name for Mozilla Firefox's C++ implementation of JavaScript. It is intended to be embedded in other applications that provide host environments for JavaScript.

Security Fix(es):

Certain network request objects were freed too early when releasing a network request handle. This could have lead to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.(CVE-2022-22740)

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

(CVE-2023-29532)

Record
OESA-2024-1746
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
Show 11 moreShow less
OSVOESA-2024-1747 6.5

mozjs78 security update

SpiderMonkey is the code-name for Mozilla Firefox's C++ implementation of JavaScript. It is intended to be embedded in other applications that provide host environments for JavaScript.

Security Fix(es):

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

(CVE-2023-29532)

Record
OESA-2024-1747
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVOESA-2024-1748 6.5

mozjs78 security update

SpiderMonkey is the code-name for Mozilla Firefox's C++ implementation of JavaScript. It is intended to be embedded in other applications that provide host environments for JavaScript.

Security Fix(es):

In the <code>nsTArray_Impl::ReplaceElementsAt()</code> function, an integer overflow could have occurred when the number of elements to replace was too large for the container. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.(CVE-2022-34481)

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

(CVE-2023-29532)

Record
OESA-2024-1748
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2023-29532 5.5

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

Record
UBUNTU-CVE-2023-29532
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2024:12852-1 No score

MozillaThunderbird-102.10.0-1.1 on GA media

These are all security issues fixed in the MozillaThunderbird-102.10.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12852-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:12856-1 No score

libmozjs-102-0-102.10.0-1.1 on GA media

These are all security issues fixed in the libmozjs-102-0-102.10.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12856-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:12882-1 No score

MozillaFirefox-112.0.1-1.1 on GA media

These are all security issues fixed in the MozillaFirefox-112.0.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12882-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:14572-1 No score

firefox-esr-128.5.1-1.1 on GA media

These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14572-1
Updated
2026-11-02
OSVSUSE-SU-2023:1817-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

  • Firefox Extended Support Release 102.10.0 ESR (bsc#1210212)
  • CVE-2023-29531: Out-of-bound memory access in WebGL on macOS
  • CVE-2023-29532: Mozilla Maintenance Service Write-lock bypass
  • CVE-2023-29533: Fullscreen notification obscured
  • MFSA-TMP-2023-0001: Double-free in libwebp
  • CVE-2023-29535: Potential Memory Corruption following Garbage Collector compaction
  • CVE-2023-29536: Invalid free from JavaScript code
  • CVE-2023-29539: Content-Disposition filename truncation leads to Reflected File Download
  • CVE-2023-29541: Files with malicious extensions could have been downloaded unsafely on Linux
  • CVE-2023-29542: Bypass of file download extension restrictions
  • CVE-2023-29545: Windows Save As dialog resolved environment variables
  • CVE-2023-1945: Memory Corruption in Safe Browsing Code
  • CVE-2023-29548: Incorrect optimization result on ARM64
  • CVE-2023-29550: Memory safety bugs fixed in Firefox 112 and Firefox ESR 102.10
Record
SUSE-SU-2023:1817-1
Updated
2026-11-02
OSVSUSE-SU-2023:1819-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

  • Firefox Extended Support Release 102.10.0 ESR (bsc#1210212)
  • CVE-2023-29531: Out-of-bound memory access in WebGL on macOS
  • CVE-2023-29532: Mozilla Maintenance Service Write-lock bypass
  • CVE-2023-29533: Fullscreen notification obscured
  • MFSA-TMP-2023-0001: Double-free in libwebp
  • CVE-2023-29535: Potential Memory Corruption following Garbage Collector compaction
  • CVE-2023-29536: Invalid free from JavaScript code
  • CVE-2023-29539: Content-Disposition filename truncation leads to Reflected File Download
  • CVE-2023-29541: Files with malicious extensions could have been downloaded unsafely on Linux
  • CVE-2023-29542: Bypass of file download extension restrictions
  • CVE-2023-29545: Windows Save As dialog resolved environment variables
  • CVE-2023-1945: Memory Corruption in Safe Browsing Code
  • CVE-2023-29548: Incorrect optimization result on ARM64
  • CVE-2023-29550: Memory safety bugs fixed in Firefox 112 and Firefox ESR 102.10
Record
SUSE-SU-2023:1819-1
Updated
2026-11-02
OSVSUSE-SU-2023:1855-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues:

  • Firefox Extended Support Release 102.10.0 ESR (bsc#1210212)
  • CVE-2023-29531: Out-of-bound memory access in WebGL on macOS
  • CVE-2023-29532: Mozilla Maintenance Service Write-lock bypass
  • CVE-2023-29533: Fullscreen notification obscured
  • MFSA-TMP-2023-0001: Double-free in libwebp
  • CVE-2023-29535: Potential Memory Corruption following Garbage Collector compaction
  • CVE-2023-29536: Invalid free from JavaScript code
  • CVE-2023-29539: Content-Disposition filename truncation leads to Reflected File Download
  • CVE-2023-29541: Files with malicious extensions could have been downloaded unsafely on Linux
  • CVE-2023-29542: Bypass of file download extension restrictions
  • CVE-2023-29545: Windows Save As dialog resolved environment variables
  • CVE-2023-1945: Memory Corruption in Safe Browsing Code
  • CVE-2023-29548: Incorrect optimization result on ARM64
  • CVE-2023-29550: Memory safety bugs fixed in Firefox 112 and Firefox ESR 102.10
Record
SUSE-SU-2023:1855-1
Updated
2026-11-02
OSVSUSE-SU-2023:2064-1 No score

Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues:

Update to Mozilla Thunderbird 102.10.1 (MFSA 2023-15) (bsc#1210212):

Security fixes:

  • CVE-2023-29531: Out-of-bound memory access in WebGL on macOS (bmo#1794292)
  • CVE-2023-29532: Mozilla Maintenance Service Write-lock bypass (bmo#1806394)
  • CVE-2023-29533: Fullscreen notification obscured (bmo#1798219, bmo#1814597)
  • CVE-2023-1999: Double-free in libwebp (bmo#1819244)
  • CVE-2023-29535: Potential Memory Corruption following Garbage Collector compaction (bmo#1820543)
  • CVE-2023-29536: Invalid free from JavaScript code (bmo#1821959)
  • CVE-2023-0547: Revocation status of S/Mime recipient certificates was not checked (bmo#1811298)
  • CVE-2023-29479: Hang when processing certain OpenPGP messages (bmo#1824978)
  • CVE-2023-29539: Content-Disposition filename truncation leads to Reflected File Download (bmo#1784348)
  • CVE-2023-29541: Files with malicious extensions could have been downloaded unsafely on Linux (bmo#1810191)
  • CVE-2023-29542: Bypass of file download extension restrictions (bmo#1810793, bmo#1815062)
  • CVE-2023-29545: Windows Save As dialog resolved environment variables (bmo#1823077)
  • CVE-2023-1945: Memory Corruption in Safe Browsing Code (bmo#1777588)
  • CVE-2023-29548: Incorrect optimization result on ARM64 (bmo#1822754)
  • CVE-2023-29550: Memory safety bugs fixed in Thunderbird 102.10 (bmo#1720594, bmo#1751945, bmo#1812498, bmo#1814217, bmo#1818357, bmo#1818762, bmo#1819493, bmo#1820389, bmo#1820602, bmo#1821448, bmo#1822413, bmo#1824828)

Other fixes:

  • fixed: Messages with missing or corrupt 'From:' header did not display message header buttons (bmo#1793918)
  • fixed: Composer repeatedly prompted for S/MIME smartcard signing/encryption password (bmo#1828366)
  • fixed: Address Book integration did not work with macOS 11.4 Bug Sur (bmo#1720257)
  • fixed: Mexico City DST fix in Thunderbird 102.10.0 (bug 1826146) was incomplete (bmo#1827503)
  • changed: New messages will automatically select S/MIME if configured and OpenPGP is not (bmo#1793278)
  • fixed: Calendar events with timezone America/Mexico_City incorrectly applied Daylight Savings Time (bmo#1826146)
  • fixed: Security fixes
Record
SUSE-SU-2023:2064-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
firefox-esr
Alpine:v3.18
before 102.10.0-r0
102.10.0-r0
firefox-esr
Alpine:v3.19
before 102.10.0-r0
102.10.0-r0
firefox-esr
Alpine:v3.20
before 102.10.0-r0
102.10.0-r0
firefox-esr
Alpine:v3.21
before 102.10.0-r0
102.10.0-r0
firefox-esr
Alpine:v3.22
before 102.10.0-r0
102.10.0-r0
firefox-esr
Alpine:v3.23
before 102.10.0-r0
102.10.0-r0
mozjs78
openEuler:20.03-LTS-SP4
From an advisory covering 2 CVEs
before 78.4.0-8.oe2003sp4
78.4.0-8.oe2003sp4
mozjs78
openEuler:22.03-LTS-SP1
before mozjs91-91.6.0-5.oe2203sp1
mozjs91-91.6.0-5.oe2203sp1
mozjs78
openEuler:22.03-LTS-SP3
From an advisory covering 2 CVEs
before mozjs91-91.6.0-5.oe2203sp3
mozjs91-91.6.0-5.oe2203sp3
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
From an advisory covering 12 CVEs
before 102.10.0-150000.150.82.1
102.10.0-150000.150.82.1
Show 35 moreShow less
Affected packages
PackageAffectedFixed
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP1-LTSS
From an advisory covering 12 CVEs
before 102.10.0-150000.150.82.1
102.10.0-150000.150.82.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
From an advisory covering 12 CVEs
before 102.10.0-150000.150.82.1
102.10.0-150000.150.82.1
MozillaFirefox
SUSE:OpenStack Cloud 9
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:OpenStack Cloud Crowbar 9
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP2-BCL
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP4-ESPOS
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP4-LTSS
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 12 CVEs
before 102.10.0-112.156.1
102.10.0-112.156.1
MozillaFirefox
SUSE:Linux Enterprise Module for Desktop Applications 15 SP4
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise Real Time 15 SP3
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP2-LTSS
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise Server 15 SP3-LTSS
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP2
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Linux Enterprise Server for SAP Applications 15 SP3
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Enterprise Storage 7
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
SUSE:Enterprise Storage 7.1
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaFirefox
openSUSE:Leap 15.4
From an advisory covering 12 CVEs
before 102.10.0-150200.152.84.1
102.10.0-150200.152.84.1
MozillaThunderbird
SUSE:Linux Enterprise Module for Package Hub 15 SP4
From an advisory covering 15 CVEs
before 102.10.1-150200.8.113.2
102.10.1-150200.8.113.2
MozillaThunderbird
SUSE:Linux Enterprise Workstation Extension 15 SP4
From an advisory covering 15 CVEs
before 102.10.1-150200.8.113.2
102.10.1-150200.8.113.2
MozillaThunderbird
openSUSE:Leap 15.4
From an advisory covering 15 CVEs
before 102.10.1-150200.8.113.2
102.10.1-150200.8.113.2
mozjs52
Ubuntu:18.04:LTS
All versions, plus listed versions
52.3.1-0ubuntu352.3.1-7fakesync152.8.1-0ubuntu0.18.04.152.9.1-0ubuntu0.18.04.1
None known
mozjs38
Ubuntu:18.04:LTS
All versions, plus listed versions
38.8.0~repack1-0ubuntu138.8.0~repack1-0ubuntu338.8.0~repack1-0ubuntu4
None known
mozjs68
Ubuntu:20.04:LTS
All versions, plus listed versions
68.5.0-1~fakesync68.5.0-2~fakesync68.6.0-168.6.0-1ubuntu1
None known
mozjs52
Ubuntu:20.04:LTS
All versions, plus listed versions
52.9.1-1build152.9.1-1ubuntu3
None known
mozjs78
Ubuntu:22.04:LTS
All versions, plus listed versions
78.13.0-178.15.0-278.15.0-4ubuntu1
None known
mozjs91
Ubuntu:22.04:LTS
All versions, plus listed versions
91.5.1-0ubuntu191.6.0-191.6.0-291.7.0-291.10.0-0ubuntu1
None known
MozillaThunderbird
openSUSE:Tumbleweed
From an advisory covering 15 CVEs
before 102.10.0-1.1
102.10.0-1.1
MozillaFirefox
openSUSE:Tumbleweed
From an advisory covering 21 CVEs
before 112.0.1-1.1
112.0.1-1.1
firefox-esr
openSUSE:Tumbleweed
From an advisory covering 1860 CVEs
before 128.5.1-1.1
128.5.1-1.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-29532 is a medium vulnerability (CVSS 5.5) in Mozilla Firefox, published April 11, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 8th percentile. Fixed in firefox-esr 102.10.0-r0.

References

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Left out here: 1,688 references. The JSON record has them.

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