CVE-2009-2855: squid-cache squid Improper Input Validation
CVSS: 5.0v2.0MediumModified
AliasesDEBIAN-CVE-2009-2855
Published 18-08-2009Last modified 07-08-2024
Vulnerability summary
CVE-2009-2855 is a medium (CVSS 5.0) Improper Input Validation vulnerability in squid-cache squid. EPSS estimates a 34.03% chance of exploitation in the next 30 days, higher than 98.3% of scored vulnerabilities.
CVSS score
5.0/10
010
Medium · v2.0 (NVD)EPSS score
34.03%
0%100%
High · 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 2Timeline
- 18-08-2009PublishedVulnerability first disclosed.
- 07-08-2024Last modifiedVulnerability information updated.
Description
The strListGetItem function in src/HttpHeaderTools.c in Squid 2.7 allows remote attackers to cause a denial of service via a crafted auth header with certain comma delimiters that trigger an infinite loop of calls to the strcspn function.
CVSS metrics
1 score · 1 source · 1 versionMedium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
34.03%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
0.00 pp
From 34.03% on 18-09-2026
18-09-202618-10-2026
EPSS score34.03%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- squid< 2.7.STABLE7-1
Squid-cache1 product
- squidEOL2.7 | 2.7:stable3 | 2.7:stable4
2 vendors · 2 products
References
13 links
bugs.debian.org/cgi-bin/bugreport.cgi?bug=534982X Refsource CONFIRM- www.squid-cache.org/bugs/show_bug.cgi?id=2541X Refsource CONFIRM
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10592VDB EntrySignatureX Refsource OVAL
- bugzilla.redhat.com/show_bug.cgi?id=518182X Refsource CONFIRM