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CVE-2012-1577

31
FAUCET Score

CVE-2012-1577 describes a critical vulnerability in the random number generation function (random.c) within lib/libc/stdlib in OpenBSD, as well as products like Debian and Dietlibc. This flaw allows the random number generator to return a predictable zero value when seeded with zero, leading to a severe weakness in applications relying on its randomness. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over a network with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:dietlibc_project:dietlibc:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:-:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 60th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cvsweb.openbsd.org / cgi-bin/cvsweb/src/lib/libc/stdlib/random.c
Vendor Advisory
github.com / ensc/dietlibc/blob/master/CHANGES
Third Party Advisory
security-tracker.debian.org / tracker/CVE-2012-1577
Third Party Advisory
openwall.com / lists/oss-security/2012/03/23/14
Mailing ListThird Party Advisory