CVE-2015-8867: canonical ubuntu_linux Cryptographic Issues
Vulnerability summary
CVE-2015-8867 is a high (CVSS 7.5) Cryptographic Issues vulnerability in canonical ubuntu_linux. EPSS estimates a 4.35% chance of exploitation in the next 30 days, higher than 91.2% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 22-05-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The openssl_random_pseudo_bytes function in ext/openssl/openssl.c in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 incorrectly relies on the deprecated RAND_pseudo_bytes function, which makes it easier for remote attackers to defeat cryptographic protection mechanisms via unspecified vectors.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
4.35%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.35% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 15.10
Php1 product
- php≥ 5.4.0, < 5.4.44 | ≥ 5.5.0, < 5.5.28 | ≥ 5.6.0, < 5.6.12
Ubuntu1 product
- php5< 5.5.9+dfsg-1ubuntu4.16
3 vendors · 3 products
References
16 links- lists.opensuse.org/opensuse-security-announce/2016-05/msg00031.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-05/msg00033.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 16 references
- lists.opensuse.org/opensuse-security-announce/2016-05/msg00056.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory