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CVE-2019-15903

HIGH
7.5
CVSS Score
Published: September 4, 2019 at 05:59 AM UTC
Updated: October 14, 2026 at 07:16 AM UTC
2 products affected across 2 vendorsPythonLibexpat

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Severity
HIGH7.5
Exploit prediction
EPSS 7%
SSVC
No known exploit

Description

In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Libexpat· Libexpat Project
95%
v < 2.2.8
Affected range stops below 2.2.8, so it looks safe — our inference, not a vendor statement
Python· Python
95%
2.7.0 ≤ v < 2.7.173.5.0 ≤ v < 3.5.83.6.0 ≤ v < 3.6.103.7.0 ≤ v < 3.7.5
Affected range stops below 2.7.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.5.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.6.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.7.5, so it looks safe — our inference, not a vendor statement

References (60)

Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00080.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00081.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00000.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00002.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00003.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00013.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00016.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00017.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125CWE-776

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