CVE-2020-27818: debian debian_linux Classic Buffer Overflow
CVSS: 4.3v2.0MediumModified
AliasesopenSUSE-SU-2020:2220-1openSUSE-SU-2020:2227-1UBUNTU-CVE-2020-27818DEBIAN-CVE-2020-27818DLA-3032-1openSUSE-SU-2020:2177-1openSUSE-SU-2020:2198-1openSUSE-SU-2024:11176-1
Published 08-12-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-27818 is a medium (CVSS 4.3) Classic Buffer Overflow vulnerability in debian debian_linux. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.1% of scored vulnerabilities.
CVSS score
4.3/10
010
Medium · v2.0 (NVD)EPSS score
1.22%
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 1 · Related 1Timeline
- 08-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in the check_chunk_name() function of pngcheck-2.4.0. An attacker able to pass a malicious file to be processed by pngcheck could cause a temporary denial of service, posing a low risk to application availability.
CVSS metrics
4 scores · 3 sources · 2 versionsLow 3.3Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LSourcesAll 3 agree
- OSV · DebianEcosystem advisory · calculated3.3LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- NVDNIST3.3LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.22%
Chance of exploitation in the next 30 days
Percentile
68%
Versus all other CVEs
30-day change
0.00 pp
From 1.22% on 19-09-2026
19-09-202619-10-2026
EPSS score1.22%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
Affected systems
Opensuse3 products
- pngcheck&distro=openSUSE Leap 15.1< 2.3.0-lp151.3.3.1
- pngcheck&distro=openSUSE Leap 15.2< 2.3.0-lp152.4.3.1
- pngcheck&distro=openSUSE Tumbleweed< 3.0.0-1.7
Debian2 products
- pngcheck< 2.3.0-13 | < 2.3.0-7+deb9u1
- debian_linuxEOL9.0
Fedoraproject2 products
- extra_packages_for_enterprise_linux7.0 | 8.0
- fedoraEOL31 | 32 | 33 | 34
Suse2 products
- pngcheck&distro=SUSE Package Hub 15 SP1< 2.3.0-bp151.4.3.1
- pngcheck&distro=SUSE Package Hub 15 SP2< 2.3.0-bp152.4.3.1
Libpng1 product
- pngcheck2.4.0
Ubuntu1 product
- pngcheck< 2.3.0-7ubuntu0.16.04.1~esm1 | < 2.3.0-7ubuntu0.18.04.1~esm1 | < 2.3.0-7ubuntu0.20.04.1 | All versions (No fix recorded)
6 vendors · 11 products
References
18 links- bugzilla.redhat.com/show_bug.cgi?id=1902011X Refsource CONFIRMREPORTIssue TrackingThird Party Advisory
lists.debian.org/debian-lts-announce/2022/05/msg00043.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.opensuse.org/archives/…Advisory
Show all 18 references
- lists.opensuse.org/archives/…Advisory
- lists.opensuse.org/archives/…Advisory
- lists.opensuse.org/archives/…Advisory