CVE-2021-20275: debian debian_linux
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2021-20275UBUNTU-CVE-2021-20275DEBIAN-CVE-2021-20275
Published 09-03-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-20275 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 1.95% chance of exploitation in the next 30 days, higher than 79.9% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.95%
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 5 · Related 4Timeline
- 09-03-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in privoxy before 3.0.32. A invalid read of size two may occur in chunked_body_is_complete() leading to denial of service.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- 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
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.95%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
0.00 pp
From 1.95% on 19-09-2026
19-09-202619-10-2026
EPSS score1.95%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
Affected systems
Debian2 products
- privoxy< 3.0.32-1
- debian_linuxEOL9.0
Alpine1 product
- privoxy< 3.0.32-r0
Privoxy1 product
- privoxy< 3.0.32
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 · 5 products
References
11 links
lists.debian.org/debian-lts-announce/2021/03/msg00009.htmlMailing ListX Refsource MLISTThird Party Advisory