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CVE-2024-6383

MongoDB C Driver bson_string_append may be vulnerable to a buffer overflow

5.3 MediumFix available

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

0.62%Up 0.6 points since Jul 4, 2024
90%50%10%1%

What each source reports

CVE List Score used 5.3

MongoDB C Driver bson_string_append may be vulnerable to a buffer overflow

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Record
CVE-2024-6383
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-122
Updated
2026-11-02
EUVDEUVD-2024-47490 5.3

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Record
EUVD-2024-47490
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-w25p-2jj3-j5vr 5.3

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where...

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Record
GHSA-w25p-2jj3-j5vr
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-122
Updated
2026-11-02
NVD 5.3

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Record
CVE-2024-6383
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-122
Updated
2026-11-02
OSVDEBIAN-CVE-2024-6383 5.3

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Record
DEBIAN-CVE-2024-6383
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVOESA-2024-1880 5.3

mongo-c-driver security update

mongo-c-driver is a project that includes two libraries: libmongoc, a client library written in C for MongoDB. libbson, a library providing useful routines related to building, parsing, and iterating BSON documents.

Security Fix(es):

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1(CVE-2024-6383)

Record
OESA-2024-1880
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2024-6383 5.3

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Record
UBUNTU-CVE-2024-6383
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSV No score

The bson_string_append function in MongoDB C Driver may be vulnerable to a buffer overflow where the function might attempt to allocate too small of buffer and may lead to memory corruption of neighbouring heap memory. This issue affects libbson versions prior to 1.27.1

Record
CVE-2024-6383
Updated
2026-11-02
OSVUSN-7613-1 No score

mongo-c-driver vulnerabilities

Karman Liu discovered that mongo-c-driver did not correctly handle certain memory operations. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2024-6381)

Karman Liu discovered that mongo-c-driver did not correctly handle certain memory operations. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 24.04 LTS. (CVE-2024-6383, CVE-2025-0755)

Record
USN-7613-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libbson-xs-perl
Debian:12
before 0.8.4-2+deb12u1, plus listed versions
0.8.4-2
0.8.4-2+deb12u1
mongo-c-driver
Debian:12
before 1.23.1-1+deb12u1, plus listed versions
1.23.1-1
1.23.1-1+deb12u1
mongo-c-driver
Debian:13
before 1.27.1-1
1.27.1-1
mongo-c-driver
Debian:14
before 1.27.1-1
1.27.1-1
libbson-xs-perl
Debian:11
From an advisory covering 6 CVEs
before 0.8.4-1+deb11u1, plus listed versions
0.8.4-1
0.8.4-1+deb11u1
mongo-c-driver
Debian:11
From an advisory covering 5 CVEs
before 1.17.6-1+deb11u1, plus listed versions
1.17.6-1
1.17.6-1+deb11u1
mongo-c-driver
openEuler:22.03-LTS-SP3
before 1.27.4-1.oe2203sp3
1.27.4-1.oe2203sp3
mongo-c-driver
openEuler:20.03-LTS-SP4
before 1.27.4-1.oe2003sp4
1.27.4-1.oe2003sp4
mongo-c-driver
openEuler:24.03-LTS
before 1.27.4-1.oe2403
1.27.4-1.oe2403
mongo-c-driver
openEuler:22.03-LTS-SP4
before 1.27.4-1.oe2203sp4
1.27.4-1.oe2203sp4
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Affected packages
PackageAffectedFixed
mongo-c-driver
openEuler:22.03-LTS-SP1
before 1.27.4-1.oe2203sp1
1.27.4-1.oe2203sp1
libbson
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
1.3.1-11.3.1-1ubuntu0.1~esm1
None known
libbson
Ubuntu:Pro:18.04:LTS
All versions, plus listed versions
1.8.0-11.8.1-11.9.0-11.9.2-11.9.2-1ubuntu0.1~esm2
None known
mongo-c-driver
Ubuntu:Pro:20.04:LTS
All versions, plus listed versions
1.15.0-11.15.1-11.15.2-11.16.0-11.16.1-11.16.1-1build11.16.1-1build21.16.1-1ubuntu0.1~esm1
None known
mongo-c-driver
Ubuntu:22.04:LTS
All versions, plus listed versions
1.18.0-11.19.1-11.19.2-11.20.0-11.20.0-1build11.20.1-11.21.0-11.21.0-1build1
None known
mongo-c-driver
Ubuntu:Pro:24.04:LTS
before 1.26.0-1.1ubuntu2+esm1, plus listed versions
1.24.3-11.24.4-11.25.1-11.25.2-11.25.4-11.26.0-11.26.0-1.1ubuntu11.26.0-1.1ubuntu2
1.26.0-1.1ubuntu2+esm1
mongo-c-driver
Ubuntu:Pro:20.04:LTS
From an advisory covering 3 CVEs
before 1.16.1-1ubuntu0.1~esm1, plus listed versions
1.15.0-11.15.1-11.15.2-11.16.0-11.16.1-11.16.1-1build11.16.1-1build2
1.16.1-1ubuntu0.1~esm1
mongo-c-driver
Ubuntu:Pro:22.04:LTS
From an advisory covering 3 CVEs
before 1.21.0-1ubuntu0.1~esm1, plus listed versions
1.18.0-11.19.1-11.19.2-11.20.0-11.20.0-1build11.20.1-11.21.0-11.21.0-1build1
1.21.0-1ubuntu0.1~esm1
mongo-c-driver
Ubuntu:Pro:24.04:LTS
From an advisory covering 3 CVEs
before 1.26.0-1.1ubuntu2+esm1, plus listed versions
1.24.3-11.24.4-11.25.1-11.25.2-11.25.4-11.26.0-11.26.0-1.1ubuntu11.26.0-1.1ubuntu2
1.26.0-1.1ubuntu2+esm1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2024-6383 is a medium vulnerability (CVSS 5.3) in Mongodb Inc Libbson, published July 3, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.62%, the 50th percentile. Fixed in libbson-xs-perl 0.8.4-2+deb12u1.

References

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