Lack of verification in haserl, a component of Alpine Linux Configuration Framework, before 0.9.36 allows local users to read the contents…

published 2021-03-24 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15774

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 1; Metasploit

Lack of verification in haserl, a component of Alpine Linux Configuration Framework, before 0.9.36 allows local users to read the contents of any file on the filesystem.

Patch / fix

fixed in 1 distros 2 links 2

haserl_project haserl 0.9.36

opensuse alpine

haserl openSUSE Tumbleweed 0.9.36-1.3
haserl Package Hub 15 SP3, Package Hub 15 SP2, Package Hub 15 SP1 +2 more 0.9.36-bp153.2.3.1

opensuse advisories openSUSE-SU-2024:10840-1 openSUSE-SU-2021:1279-1

haserl Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 0.9.36-r0

alpine advisories ALPINE-CVE-2021-29133

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

github.com/rapid7/metasploit-framework#14833 commit
github.com/rapid7/metasploit-framework#14833 pull request

Exploit prediction

1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit post/linux/gather/haserl_read Haserl Arbitrary File Reader metasploit post, normal rank
github.com https://github.com/rapid7/metasploit-framework/pull/14833 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

References

github.com /rapid7/metasploit-framework/pull/14833
exploit, patch, third-party-advisory
github.com /rapid7/metasploit-framework/pull/14833/commits/5bf6b2d094deb22fa8183ce161b90cbe4fd40a70
patch, third-party-advisory
gitlab.alpinelinux.org /alpine/aports/-/issues/12539
issue-tracking, vendor-advisory
twitter.com /steaIth/status/1364940271054712842
third-party-advisory

Sources

CVE List CVE-2021-29133
NVD CVE-2021-29133

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary