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NVD / CVE Program· CNA mitre

CVE-2020-24977: GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at libxml2/entities.c.

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.9% (FIRST EPSS); higher than 87.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: libxml2 (Alpine:v3.10) 2.9.9-r4; libxml2 (Alpine:v3.11) 2.9.10-r4; libxml2 (Alpine:v3.12) 2.9.10-r5.
  • Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to libxml2 (Alpine:v3.10) 2.9.9-r4; libxml2 (Alpine:v3.11) 2.9.10-r4; libxml2 (Alpine:v3.12) 2.9.10-r5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at libxml2/entities.c. The issue has been fixed in commit 50f06b3e.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Sep 4, 2020
Updated
Oct 14, 2026
EPSS
2.9% · 87th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.9%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-24977

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
xmlsoftlibxml2
debiandebian linux
fedoraprojectfedora
opensuseleap
netappactive iq unified manager
netappclustered data ontap
netappclustered data ontap antivirus connector
netappinventory collect tool
netappmanageability software development kit
netappsnapdrive
netapphci h410c firmware
netapphci h410c

and 7 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux9.0
  • fedoraproject fedora31
  • fedoraproject fedora32
  • fedoraproject fedora33
  • netapp active iq unified manager7.3 and later
  • netapp active iq unified manager9.5 and later
  • netapp clustered data ontapall versions
  • netapp clustered data ontap antivirus connectorall versions
  • netapp hci h410c firmwareall versions
  • netapp inventory collect toolall versions
  • netapp manageability software development kitall versions
  • netapp snapdriveall versions
  • opensuse leap15.1
  • opensuse leap15.2
  • oracle communications cloud native core network function cloud native environment1.10.0
  • oracle enterprise manager base platform13.4.0.0
  • oracle enterprise manager base platform13.5.0.0
  • oracle enterprise manager ops center12.4.0.0
  • oracle http server12.2.1.3.0
  • oracle http server12.2.1.4.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.10libxml2before 2.9.9-r42.9.9-r4
Alpine:v3.11libxml2before 2.9.10-r42.9.10-r4
Alpine:v3.12libxml2before 2.9.10-r52.9.10-r5
Alpine:v3.9libxml2before 2.9.9-r32.9.9-r3
Debian:12libxml2before 2.9.10+dfsg-6.22.9.10+dfsg-6.2
Debian:9libxml2before 2.9.4+dfsg1-2.2+deb9u32.9.4+dfsg1-2.2+deb9u3
openSUSE:Leap 15.1libxml2before 2.9.7-lp151.5.15.12.9.7-lp151.5.15.1
openSUSE:Leap 15.1python-libxml2-pythonbefore 2.9.7-lp151.5.15.12.9.7-lp151.5.15.1
openSUSE:Leap 15.2libxml2before 2.9.7-lp152.10.3.12.9.7-lp152.10.3.1
openSUSE:Leap 15.2python-libxml2-pythonbefore 2.9.7-lp152.10.3.12.9.7-lp152.10.3.1
openSUSE:Tumbleweedlibxml2before 2.9.12-1.22.9.12-1.2
Red Hat:enterprise_linux:8::appstreamlibxml2-debuginfobefore 0:2.9.7-9.el80:2.9.7-9.el8
Red Hat:enterprise_linux:8::appstreamlibxml2-debugsourcebefore 0:2.9.7-9.el80:2.9.7-9.el8
Red Hat:enterprise_linux:8::appstreamlibxml2-develbefore 0:2.9.7-9.el80:2.9.7-9.el8
Red Hat:enterprise_linux:8::appstreampython3-libxml2-debuginfobefore 0:2.9.7-9.el80:2.9.7-9.el8
Red Hat:enterprise_linux:8::baseoslibxml2before 0:2.9.7-9.el80:2.9.7-9.el8
Red Hat:enterprise_linux:8::baseospython3-libxml2before 0:2.9.7-9.el80:2.9.7-9.el8
Rocky Linux:8libxml2before 0:2.9.7-9.el80:2.9.7-9.el8
SUSE:Linux Enterprise Module for Basesystem 15 SP1libxml2before 2.9.7-3.25.12.9.7-3.25.1
SUSE:Linux Enterprise Module for Basesystem 15 SP1python-libxml2-pythonbefore 2.9.7-3.25.12.9.7-3.25.1
SUSE:Linux Enterprise Point of Sale 11 SP3libxml2before 2.7.6-0.77.36.12.7.6-0.77.36.1
SUSE:Linux Enterprise Point of Sale 11 SP3libxml2-pythonbefore 2.7.6-0.77.36.12.7.6-0.77.36.1
SUSE:Linux Enterprise Server 12 SP5python-libxml2before 2.9.4-46.34.12.9.4-46.34.1
SUSE:Linux Enterprise Software Development Kit 12 SP5libxml2before 2.9.4-46.34.12.9.4-46.34.1

Same product

xmlsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2008-3529Heap-based buffer overflow in the xmlParseAttValueComplex function in parser.c in libxml2 before 2.7.0 allows context-dependent attackers to
    47Plan
  • CVE-2017-7376Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling
    46Plan
  • CVE-2022-40303An issue was discovered in libxml2 before 2.10.3.
    42Plan

Published before and after this one in the same product

  • ← EarlierCVE-2019-20388Jan 21, 2020 · xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
    31Monitor
  • ← EarlierCVE-2020-7595Jan 21, 2020 · xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation.
    32Monitor
  • Later →CVE-2021-3537May 14, 2021 · A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a
    24Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:libxml22.9.9-r4 · Alpine:v3.10Package registry (OSV)
debian:libxml22.9.10+dfsg-6.2 · Debian:12Package registry (OSV)
opensuse:libxml22.9.7-lp151.5.15.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:python-libxml2-python2.9.7-lp151.5.15.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:libxml20:2.9.7-9.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:libxml2-debuginfo0:2.9.7-9.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:libxml2-debugsource0:2.9.7-9.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:libxml2-devel0:2.9.7-9.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:python3-libxml20:2.9.7-9.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:python3-libxml2-debuginfo0:2.9.7-9.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:libxml20:2.9.7-9.el8 · Rocky Linux:8Package registry (OSV)
suse:libxml22.9.4-46.34.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)
suse:libxml2-python2.7.6-0.77.36.1 · SUSE:Linux Enterprise Point of Sale 11 SP3Package registry (OSV)
suse:python-libxml22.9.4-46.34.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:python-libxml2-python2.9.7-3.25.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records