CVE-2019-13377: canonical ubuntu_linux Observable Discrepancy
Vulnerability summary
CVE-2019-13377 is a medium (CVSS 5.9) Observable Discrepancy vulnerability in canonical ubuntu_linux. EPSS estimates a 2.54% chance of exploitation in the next 30 days, higher than 84.9% of scored vulnerabilities.
Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 15-08-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The implementations of SAE and EAP-pwd in hostapd and wpa_supplicant 2.x through 2.8 are vulnerable to side-channel attacks as a result of observable timing differences and cache access patterns when Brainpool curves are used. An attacker may be able to gain leaked information from a side-channel attack that can be used for full password recovery.
CVSS metrics
6 scores · 4 sources · 3 versions- OSV · AlpineEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
2.54%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.54% 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.
Alpine2 products
- hostapd≥ 2.0, < 2.8-r1 | ≥ 2.0, < 2.7-r4
- wpa_supplicant< 2.8-r2 | < 2.7-r4
Debian2 products
- wpa< 2:2.9-1
- debian_linuxEOL10.0
Canonical1 product
- ubuntu_linuxEOL18.04 | 19.04
Fedoraproject1 product
- fedoraEOL30
Ubuntu1 product
- wpa< 2:2.6-15ubuntu2.4
W1.fi1 product
- hostapd≥ 2.0, ≤ 2.8
6 vendors · 8 products
References
13 links- w1.fi/cgit/hostap/commit/?id=147bf7b88a9c231322b5b574263071ca6dbb0503X Refsource MISCMailing ListPatchVendor Advisory
- w1.fi/cgit/hostap/commit/?id=cd803299ca485eb857e37c88f973fccfbb8600e5X Refsource MISCMailing ListPatchVendor Advisory
- wpa3.mathyvanhoef.comREPORT