Vulnerability · Published May 27, 2021 · Assigned by mitre
CVE-2021-28651
High 7.5
In plain English
A high-severity security flaw in the libecap package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 7.4% (higher than 94% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)7.4%top 5.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | libecap | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2021:4292 |
| AlmaLinux:8 | libecap-devel | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2021:4292 |
| AlmaLinux:8 | squid | 7:4.15-3.module_el8.6.0+3010+383bc947.1 | ALSA-2021:4292 |
| Alpine:v3.20 | squid | 5.0.6-r0 | ALPINE-CVE-2021-28651 |
| Alpine:v3.21 | squid | 5.0.6-r0 | ALPINE-CVE-2021-28651 |
| Alpine:v3.22 | squid | 5.0.6-r0 | ALPINE-CVE-2021-28651 |
| Alpine:v3.23 | squid | 5.0.6-r0 | ALPINE-CVE-2021-28651 |
| Alpine:v3.24 | squid | 5.0.6-r0 | ALPINE-CVE-2021-28651 |
| Debian:12 | squid | 4.13-10 | DEBIAN-CVE-2021-28651 |
| Debian:13 | squid | 4.13-10 | DEBIAN-CVE-2021-28651 |
| Debian:14 | squid | 4.13-10 | DEBIAN-CVE-2021-28651 |
| Rocky Linux:8 | libecap | 0:1.0.1-2.module+el8.4.0+404+316a0dc5 | RLSA-2021:4292 |
| Rocky Linux:8 | squid | 7:4.15-1.module+el8.5.0+705+218dec94 | RLSA-2021:4292 |
Affected products (as reported)
References
- https://bugs.squid-cache.org/show_bug.cgi?id=5104
- https://github.com/squid-cache/squid/security/advisories/GHSA-ch36-9jhx-phm4
- DSA-4924 vendor-advisory
- FEDORA-2021-c0bec55ec7 vendor-advisory
- FEDORA-2021-24af72ff2c vendor-advisory
- [debian-lts-announce] 20210614 [SECURITY] [DLA 2685-1] squid3 security update mailing-list
- https://security.netapp.com/advisory/ntap-20210716-0007/
- [oss-security] 20231011 Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days. mailing-list
- 20231016 Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days. mailing-list