CVE-2021-20216: privoxy Uncontrolled Resource Consumption
CVSS: 7.8v2.0HighModified
AliasesALPINE-CVE-2021-20216UBUNTU-CVE-2021-20216DEBIAN-CVE-2021-20216
Published 25-03-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-20216 is a high (CVSS 7.8) Uncontrolled Resource Consumption vulnerability in privoxy. EPSS estimates a 2.28% chance of exploitation in the next 30 days, higher than 82.8% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v2.0 (NVD)EPSS score
2.28%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 6 · Related 4Timeline
- 25-03-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in Privoxy in versions before 3.0.31. A memory leak that occurs when decompression fails unexpectedly may lead to a denial of service. The highest threat from this vulnerability is to system availability.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · OSV · Alpine (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
High 7.8Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:CSourcesSingle source
EPSS trend
Probability
2.28%
Chance of exploitation in the next 30 days
Percentile
83%
Versus all other CVEs
30-day change
0.00 pp
From 2.28% on 19-09-2026
19-09-202619-10-2026
EPSS score2.28%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-401Missing Release of Memory after Effective LifetimeThe product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
Affected systems
Alpine1 product
- privoxy< 3.0.31-r0
Debian1 product
- privoxy< 3.0.31-1
Privoxy1 product
- privoxy< 3.0.31
Ubuntu1 product
- privoxy< 3.0.21-7+deb8u1ubuntu0.1~esm1 | < 3.0.24-1ubuntu0.1 | < 3.0.26-5ubuntu0.1 | < 3.0.28-2ubuntu0.1
4 vendors · 4 products
References
10 links- www.openwall.com/lists/oss-security/2021/01/31/2X Refsource MISCREPORTMailing ListRelease NotesThird Party Advisory
