Is CVE-2019-9740 in the CISA KEV catalog?

No. CVE-2019-9740 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-9740?

CVE-2019-9740 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2019-9740?

CVE-2019-9740 has an EPSS score of 5.52% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-9740?

Upgrade python2.7 on debian 11 to 2.7.16-3 or later. Fixes are available for 27 affected products.

CVE & CISA-KEV Catalog

CVE-2019-9740

MEDIUMEPSS 92th pctl

6.1

CVSS v3

NVD

Description

An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the query string after a ? character) followed by an HTTP header or a Redis command. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

CWE-93

How to fix

Remediation Available

python2.7Debian

Fixed in:2.7.16-3CVE-2019-9740

python2.7Ubuntu

Fixed in:2.7.6-8ubuntu0.6+esm2USN-4127-2

Fixed in:2.7.12-1ubuntu0~16.04.8USN-4127-1

Fixed in:2.7.15-4ubuntu4~18.04.1USN-4127-1

python2.7-minimalUbuntu

Fixed in:2.7.6-8ubuntu0.6+esm2USN-4127-2

Fixed in:2.7.12-1ubuntu0~16.04.8USN-4127-1

Fixed in:2.7.15-4ubuntu4~18.04.1USN-4127-1

python3.10Ubuntu

Fixed in:3.10.12-1~22.04.4USN-6891-1

python3.10-minimalUbuntu

Fixed in:3.10.12-1~22.04.4USN-6891-1

python3.11Ubuntu

Fixed in:3.11.0~rc1-1~22.04.1~esm1USN-6891-1

Fixed in:3.11.6-3ubuntu0.1USN-6891-1

python3.11-minimalUbuntu

Fixed in:3.11.0~rc1-1~22.04.1~esm1USN-6891-1

Fixed in:3.11.6-3ubuntu0.1USN-6891-1

python3.12Ubuntu

Fixed in:3.12.0-1ubuntu0.1USN-6891-1

python3.12-minimalUbuntu

Fixed in:3.12.0-1ubuntu0.1USN-6891-1

python3.4Ubuntu

Fixed in:3.4.3-1ubuntu1~14.04.7+esm2USN-4127-2

python3.4-minimalUbuntu

Fixed in:3.4.3-1ubuntu1~14.04.7+esm2USN-4127-2

python3.5Ubuntu

Fixed in:3.5.2-2ubuntu0~16.04.4~14.04.1+esm1USN-6891-1

Fixed in:3.5.2-2ubuntu0~16.04.13+esm13USN-6891-1

Fixed in:3.5.2-2ubuntu0~16.04.8USN-4127-1

python3.5-minimalUbuntu

Fixed in:3.5.2-2ubuntu0~16.04.4~14.04.1+esm1USN-6891-1

Fixed in:3.5.2-2ubuntu0~16.04.13+esm13USN-6891-1

Fixed in:3.5.2-2ubuntu0~16.04.8USN-4127-1

python3.6Ubuntu

Fixed in:3.6.8-1~18.04.2USN-4127-1

Fixed in:3.6.9-1~18.04ubuntu1.13+esm2USN-6891-1

python3.6-minimalUbuntu

Fixed in:3.6.8-1~18.04.2USN-4127-1

Fixed in:3.6.9-1~18.04ubuntu1.13+esm2USN-6891-1

python3.7Ubuntu

Fixed in:3.7.5-2ubuntu1~18.04.2+esm3USN-6891-1

python3.7-minimalUbuntu

Fixed in:3.7.5-2ubuntu1~18.04.2+esm3USN-6891-1

python3.8Ubuntu

Fixed in:3.8.0-3ubuntu1~18.04.2+esm2USN-6891-1

Fixed in:3.8.10-0ubuntu1~20.04.10USN-6891-1

python3.8-minimalUbuntu

Fixed in:3.8.0-3ubuntu1~18.04.2+esm2USN-6891-1

Fixed in:3.8.10-0ubuntu1~20.04.10USN-6891-1

python3.9Ubuntu

Fixed in:3.9.5-3ubuntu0~20.04.1+esm2USN-6891-1

python3.9-minimalUbuntu

Fixed in:3.9.5-3ubuntu0~20.04.1+esm2USN-6891-1

Python 2Windows application

Affected:3.7.0 3.7.4Fixed in:3.7.4Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:2.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.6.0 3.6.9Fixed in:3.6.9Python Software Foundation

Python 3.10Windows application

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:2.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.7.0 3.7.4Fixed in:3.7.4Python Software Foundation

Affected:3.6.0 3.6.9Fixed in:3.6.9Python Software Foundation

Python 3.11Windows application

Affected:3.7.0 3.7.4Fixed in:3.7.4Python Software Foundation

Affected:3.6.0 3.6.9Fixed in:3.6.9Python Software Foundation

Affected:2.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Python 3.12Windows application

Affected:3.7.0 3.7.4Fixed in:3.7.4Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:3.6.0 3.6.9Fixed in:3.6.9Python Software Foundation

Affected:2.0 2.7.17Fixed in:2.7.17Python Software Foundation

Python 3.8Windows application

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:3.7.0 3.7.4Fixed in:3.7.4Python Software Foundation

Affected:3.6.0 3.6.9Fixed in:3.6.9Python Software Foundation

Affected:2.0 2.7.17Fixed in:2.7.17Python Software Foundation

Python 3.9Windows application

Affected:3.7.0 3.7.4Fixed in:3.7.4Python Software Foundation

Affected:2.0 2.7.17Fixed in:2.7.17Python Software Foundation

Affected:3.5.0 3.5.8Fixed in:3.5.8Python Software Foundation

Affected:3.6.0 3.6.9Fixed in:3.6.9Python Software Foundation

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

5.52%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Related Vulnerabilities

Other CWE-93 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-61884	High	7.5	98%	KEV + Ransom	-
CVE-2022-0666	High	7.5	44%	-	Fix
CVE-2016-3115	Medium	6.4	37%	-	Fix
CVE-2024-20337	High	8.2	30%	-	Fix
CVE-2021-39172	High	8.8	29%	-	Fix
CVE-2016-4975	Medium	6.1	20%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.